Choose the correct one word substitution for the following description: An act of travelling from one place to another.

Introduction / Context:
This question belongs to the category of one word substitutions, a favourite topic in competitive English exams. Test setters provide a descriptive phrase and expect candidates to identify a single word that captures the core meaning. Here the phrase is an act of travelling from one place to another. To answer correctly, you must distinguish between general words connected with order or planning and the specific word that represents movement from one location to another.

Given Data / Assumptions:

The description is: An act of travelling from one place to another.

The context is neutral; it may refer to any distance or purpose.

The options include words related to order, travel, and planning.

Exactly one option should fit the definition precisely.

We assume standard dictionary meanings without specialised technical senses.

Concept / Approach:

We must match the key parts of the description: act, travelling, and from one place to another. A correct word should name the trip itself. Journey is commonly defined as the act of travelling from one place to another, usually by land, air, or sea. Other words like series, sequence, and programme focus on order or arrangement rather than movement. Excursion usually refers to a short trip, often for pleasure, and is more specific than the general phrase given. Therefore, the most direct and accurate word is journey.

Step-by-Step Solution:
Step 1: Identify the central idea of the phrase: movement between two places. Step 2: Consider option a, series. This means a number of events or objects of a similar or related kind occurring in order, not travel. Step 3: Consider option b, journey. Standard dictionaries define journey as the act of travelling from one place to another, which exactly matches the phrase. Step 4: Consider option c, sequence. This refers to a particular order in which related things follow each other and does not imply travel. Step 5: Consider option d, programme. This means a plan or schedule of events or activities, and is related to planning, not the travel itself. Step 6: Consider option e, excursion. This is a short trip, especially one for pleasure or education, and is more specific than the general definition provided. Step 7: Conclude that journey most directly and completely covers the given description.

Verification / Alternative check:

We can check through example sentences: The journey took six hours by train or They began their long journey across the desert. In both examples, journey clearly refers to the act of travelling from one place to another. If we substituted series or programme, the sentences would lose their meaning. Thus journey aligns perfectly with the phrase given in the question.

Why Other Options Are Wrong:

Option a, series, focuses on ordered repetition and has no necessary link to movement.

Option c, sequence, describes a specific arrangement of items or events, not physical travel.

Option d, programme, relates to planning or a schedule of activities and does not describe the movement itself.

Option e, excursion, is indeed a type of journey, but the original phrase is more general. Examinations usually expect the most direct dictionary match, which is journey.

Common Pitfalls:

Candidates sometimes choose a related but narrower term such as excursion because it clearly describes a trip. However, the presence of the word act and the lack of any hint about short duration or pleasure suggest a general definition. It is important to train yourself to look for the closest dictionary style match rather than any vaguely related word.

Final Answer:

The correct one word substitution is Journey.