Explain why you are asked to stay close to the ground while escaping a fire.

Explanation

### Step-by-Step Solution:

1. **Understanding Fire Dynamics**: When a fire occurs, it produces smoke and various toxic chemicals as it burns. These substances are lighter than air and tend to rise upwards.

**Hint**: Think about how smoke behaves in a room when something is burning.

2. **Behavior of Smoke and Toxic Chemicals**: As the fire burns, the smoke and toxic gases accumulate at higher levels in the room or area. This means that the air near the ground is relatively clearer and contains less smoke.

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