Improvement of sentence: a part of the following sentence is considered incorrect. Choose the alternative that best improves the sentence. If no improvement is needed, choose the option marked No improvement. Practically every part of the coconut tree is used by man.

Introduction / Context:
This question examines your sensitivity to natural English expressions involving quantifiers, especially phrases like practically every. It asks whether the phrase Practically every part of the coconut tree is used by man needs to be improved or whether it is already idiomatic and correct.

Given Data / Assumptions:

• Sentence: Practically every part of the coconut tree is used by man.
• Underlined phrase: Practically every part.
• Options: each, most, any, No improvement, and almost every.
• Intended meaning: Almost all the different parts of the coconut tree can be used by people.

Concept / Approach:
The expression practically every is a standard and natural way of saying almost every in English. It emphasises that the number of exceptions is very small. In this sentence, it correctly conveys that nearly all parts of the coconut tree are useful. The grammar and sense are already correct, so No improvement is the appropriate choice. While almost every would be acceptable in everyday conversation, the exam wants you to recognise that the original phrase is not wrong.

Step-by-Step Solution:
Step 1: Understand the meaning of the sentence: almost all parts of the coconut tree have some use. Step 2: Recognise that practically every is a common collocation meaning almost every. Step 3: Test each option in the sentence: Each part, most parts, any part, and almost every part. Step 4: Conclude that Practically every part is both natural and grammatically correct, so No improvement is needed.

Verification / Alternative check:
If we replace Practically every with Almost every, the meaning remains very similar, but that does not make Practically every wrong. In competitive exams, you must choose an improvement only when the original is incorrect, awkward, or clearly inferior. Here, Practically every part of the coconut tree is used by man is a sentence you can find in textbooks and articles describing the usefulness of coconut trees.

Why Other Options Are Wrong:

• each: Each part of the coconut tree is used by man suggests that there are no exceptions at all, which is stronger than the original and may not be true.
• most: Most part is grammatically wrong; it should be most parts, and even then it loses the emphasis created by practically every.
• any: Any part of the coconut tree is used by man is incorrect because not every single part may be used.
• almost every: Acceptable in meaning, but the original is already correct and idiomatic, so no change is required in this exam pattern.

Common Pitfalls:
Candidates sometimes feel compelled to change the sentence because an alternative appears more familiar, such as almost every. However, sentence improvement questions often include perfectly correct original sentences to test if you can confidently choose No improvement. Always check for real grammatical or idiomatic errors before selecting a replacement.

Final Answer:
Correct option: No improvement.