In this English grammar sentence improvement question, identify whether the adjective describing the report of the plane crash is correctly used or needs a change. Original sentence: The alarming report of the plane crash left everyone in a state of shock.

Introduction / Context:
This question checks whether you can distinguish between adjectives that describe a thing and adjectives that describe people. The sentence talks about a report of a plane crash that caused shock. The key point is whether the word "alarming" correctly describes the report, or whether one of the alternative forms is more suitable in standard English usage.

Given Data / Assumptions:
- Original sentence: The alarming report of the plane crash left everyone in a state of shock.
- The report describes a tragic event and causes fear or concern.
- We must see if "alarming" is the right word form here.

Concept / Approach:
"Alarming" is a present participle adjective used to describe something that causes alarm, fear, or great concern. It is correct to say "an alarming rise in prices" or "an alarming report". "Alarmed" on the other hand usually describes people who feel alarm or fear. So we say "the alarmed passengers", not "the alarmed report". Therefore, an "alarming report" is grammatically and semantically correct.

Step-by-Step Solution:
Step 1: Identify the noun being modified. Here it is "report". Step 2: Ask what quality we want to express. The report causes shock and fear, so it is alarming. Step 3: Recall that "alarming" describes things that cause alarm, while "alarmed" describes people who experience alarm. Step 4: Read the original phrase "alarming report" and see that it fits the pattern where the thing is the cause of the emotion. Step 5: Compare the options and note that none offers a more natural or correct alternative than the original.

Verification / Alternative check:
Consulting grammar guides and dictionaries, you will find many examples of "alarming report", "alarming news", and "alarming trend". You will rarely see "alarmed report", because a report itself cannot feel emotions. This confirms that the original use of "alarming" is correct. Therefore, the correct choice is "No improvement".

Why Other Options Are Wrong:
Option A, "alarmed report", wrongly treats the report as if it feels alarm. Option B, "alarmed reporting", is clumsy and shifts the meaning to how the reporting was done, not the content itself. Option C, "reported alarm", changes the structure entirely and sounds unnatural in this context. Option E, "very alarm report", is grammatically incorrect and unidiomatic. None of these improves the sentence.

Common Pitfalls:
Many learners confuse "-ing" and "-ed" adjectives. A useful rule is that "-ing" forms describe the thing that causes the feeling, while "-ed" forms describe the person who feels it. For example, "a boring lecture" but "bored students". Remember this pattern to handle similar questions involving adjectives like "frightening" and "frightened", "confusing" and "confused".

Final Answer:
The original sentence is already correct, so the best choice is No improvement.