What happens to your breathing rate when you :
Exercise ?

Explanation

### Step-by-Step Solution:

1. **Understanding Exercise**: When we talk about exercise, we refer to any physical activity that requires effort and increases our heart rate. This can include running, swimming, cycling, or even playing sports.

2. **Increased Energy Demand**: During exercise, our muscles require more energy to perform the activities. This increased energy demand leads to a higher requirement for oxygen in the body.

3. **Breathing Rate Increases**: To meet the increased oxygen demand, our breathing rate increases. This means we take more breaths per minute than we do when we are at rest.

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