Sentence arrangement: choose the most logical order of the labelled sentences P, Q, R and S so that they form a coherent paragraph about the instability between the two World Wars, the Great Depression and the rise of Hitler to power.

Introduction / Context:
This question is a classic sentence arrangement or para jumble task. The learner has to arrange four labelled sentences P, Q, R and S into a coherent paragraph about the years between the First and Second World Wars, the Great Depression and how Adolf Hitler used that situation to come to power. These questions test awareness of historical sequence, logical flow and the use of connector phrases such as coming to power, capitalised on this and declaring that Germany needed more living space.

Given Data / Assumptions:
Q states that the years between the first and second world wars were a time of instability.
P mentions that the Great Depression in 1929 plunged the world into recession.
R explains that Hitler, coming to power in 1933, capitalised on this economic decline and on resentment caused by the Treaty of Versailles.
S begins with Hitler declaring that Germany needed Lebensraum or living space but is left incomplete in the stem.
We assume that all four sentences come from a single historical explanation of events in chronological order.

Concept / Approach:
In sentence arrangement questions, the best way to proceed is to identify the broad introductory idea, then follow the time line and cause effect chain. Historical paragraphs usually begin with a general time frame, move to a major event, then explain how a political leader took advantage of that context and finally present that leader’s specific policy declarations. We also look for pronouns and phrases such as this economic decline that obviously refer back to an earlier sentence.

Step-by-Step Solution:
Step 1: Identify the natural introduction. Q talks generally about the years between the two world wars and calls them a time of instability. This clearly looks like an opening sentence. Step 2: Next we ask what caused that instability. P explains the Great Depression that began in 1929 and plunged the world into recession, which fits directly after Q as a key cause. Step 3: Once the economic crisis is mentioned, we look for who used it. R talks about Hitler coming to power in 1933 and capitalising on this economic decline and on resentment created by the Treaty of Versailles. The phrase this economic decline clearly refers back to P. Step 4: Finally S continues the description of Hitler by showing what he declared when in power, namely that Germany needed Lebensraum or living space. This naturally follows R. Step 5: Putting these pieces together gives the order Q P R S, which corresponds to option QPRS.

Verification / Alternative check:
If we read QPRS as a single paragraph, the sequence is smooth and chronological. First we are told that the inter war years were unstable. Then the Great Depression is introduced as a dramatic economic event that increased that instability. After that the paragraph narrows to the specific German context and to Hitler, who comes to power in 1933 and exploits both the depression and resentment against the Treaty of Versailles. Finally, S continues describing Hitler’s programme by mentioning his call for living space. There are no abrupt jumps in time or topic, and every this or that has a clear reference in the previous sentence, which confirms that the order is correct.

Why Other Options Are Wrong:
Option QSRP places S straight after Q, but S talks about Hitler’s slogan without first introducing him or the Great Depression, so it feels disconnected. Option QRPS puts R directly after Q, which introduces Hitler before the Great Depression that he is said to capitalise on, breaking the cause effect chain. Option PRQS starts with P and ignores the broad framing of Q, then jumps in an awkward manner from Hitler’s declaration in S back to the general inter war instability in Q. The extra option PQSR similarly fails to maintain a clear historical sequence.

Common Pitfalls:
A common mistake in para jumbles is to focus only on the order that sounds grammatically smooth within each pair of sentences and to ignore wider chronology and cause effect links. Another frequent error is to treat any sentence that names a famous person, such as Hitler, as the opening, even when a broader background sentence such as Q is provided. Learners also sometimes ignore connector words like this economic decline, which are powerful clues for correct ordering.

Final Answer:
The most logical and coherent order of the sentences is QPRS, so option QPRS is correct.