What is the site of gaseous exchange in an insect?

Explanation

**Step-by-Step Solution:**

1. **Identify the Gaseous Exchange System in Insects**: Insects have a specialized system for gas exchange known as the tracheal system.

2. **Understand the Structure of the Tracheal System**: The tracheal system consists of a network of tubes called tracheae. These tubes extend throughout the insect's body and are responsible for transporting gases.

3. **Locate the Entry Points for Air**: The gaseous exchange begins at small openings located on the sides of the insect's body, known as spiracles.

...