Which one of the following is most important feature of insects :-

Options

A. Compound eyes
B. Long abdomen
C. Three pairs of legs
D. Two pairs of wings

Answer

To solve the question about the most important feature of insects, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the most important feature of insects among the given options.

2. **Analyze the Options**:
- **Option 1: Compound Eyes**: While insects do have compound eyes, this feature is not exclusive to insects as it is also found in other arthropods like crustaceans. Therefore, it may not be considered the most important feature.

- **Option 2: Long Abdomen**: This feature is not a defining characteristic of insects. Insects can have varying body shapes and sizes, and a long abdomen is not universally applicable. Hence, this option is incorrect.

- **Option 3: 3 Pair of Legs**: This is a defining characteristic of insects. All insects belong to the class Insecta, which is characterized by having three pairs of legs (six legs in total). This feature is crucial for their classification.

- **Option 4: 2 Pair of Wings**: While many insects have wings, not all insects possess wings, and those that do typically have one or two pairs. Thus, this option is not universally applicable to all insects.

3. **Identify the Correct Answer**: Based on the analysis, the most important feature that is consistent across all insects is the presence of **3 pairs of legs**.

4. **Conclusion**: Therefore, the correct answer is **Option 3: 3 Pair of Legs**.