Which of the following is not an insect

Options

A. Cockroach
B. Bed bug
C. Mosquito
D. Spider

Explanation

To determine which of the following is not an insect, we need to analyze the characteristics of each option provided:

1. **Identify the Options**: The options given are:
- A) Cockroach
- B) Bed bug
- C) Mosquito
- D) Spider

2. **Understand Insect Characteristics**: Insects typically have the following characteristics:
- Three pairs of legs (total of six legs)
- Body divided into three segments: head, thorax, and abdomen
- Usually have wings (though not all insects do)

3. **Analyze Each Option**:
- **Cockroach**: This is an insect. It has six legs and fits the general characteristics of insects.
- **Bed Bug**: This is also an insect. It has six legs and shares the typical features of insects.
- **Mosquito**: This is an insect as well. It has six legs and is structured like other insects.
- **Spider**: This is not an insect. Spiders belong to the class Arachnida, which typically have eight legs and a body divided into two segments (cephalothorax and abdomen).

4. **Conclusion**: Based on the analysis, the correct answer is:
- **D) Spider** is not an insect.