An insect differs from a spider in which one of the following Ways :

Options

A. insects have three pairs of legs and two pairs of wings while spiders have four pairs of legs and no wings
B. insects have four pairs of legs and a pair of wings while spiders have four pairs of legs and no wings
C. insects have three pairs of legs and three pairs of wings while spiders have three pairs of legs and no wings
D. insects have four pairs of legs and two pairs of wings while spiders have three pairs of legs and no wings

Explanation

To determine how an insect differs from a spider, we need to analyze the characteristics of both groups. Here’s a step-by-step breakdown of the solution:

### Step 1: Identify the Classification
- Both insects and spiders belong to the phylum Arthropoda, which is characterized by jointed appendages, an exoskeleton, and a segmented body.

### Step 2: Classify the Groups
- Insects belong to the class Insecta.
- Spiders belong to the class Arachnida.

### Step 3: Compare the Number of Legs
- Insects have **three pairs of legs**, which totals **six legs**.
- Spiders have **four pairs of legs**, which totals **eight legs**.

### Step 4: Compare the Presence of Wings
- Insects typically have **two pairs of wings** (four wings in total).
- Spiders do **not have wings**.

### Step 5: Analyze the Options
Now, let's evaluate the provided options based on the information gathered:
- **Option A**: Insects have three pairs of legs and two pairs of wings while spiders have four pairs of legs and no wings. **(This is correct)**
- **Option B**: Insects have four pairs of legs and a pair of wings while spiders have four pairs of legs and no wings. **(Incorrect)**
- **Option C**: Insects have three pairs of legs and three pairs of wings while spiders have three pairs of legs and no wings. **(Incorrect)**
- **Option D**: Insects have four pairs of legs and two pairs of wings while spiders have three pairs of legs and no wings. **(Incorrect)**

### Conclusion
The correct answer is **Option A**: Insects have three pairs of legs and two pairs of wings while spiders have four pairs of legs and no wings.

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