What is first aid ?

Explanation

### Step-by-Step Text Solution:

1. **Definition of First Aid**: First aid is defined as the initial assistance or treatment given to a person who is injured or ill before professional medical help is available.

2. **Purpose of First Aid**: The primary purpose of first aid is to preserve life, prevent the condition from worsening, and promote recovery. It acts as a bridge between the incident and the arrival of professional medical assistance.

3. **Example of First Aid**: Consider a situation where someone is bleeding. If the bleeding is not severe but is left untreated, it could lead to a critical condition over time.

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