What happens to your breathing rate when you :
go to sleep ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Breathing Rate**: Breathing rate refers to the number of breaths taken in a minute. It can change based on various activities and states of the body, such as exercise, rest, or sleep.

2. **Breathing Rate During Sleep**: When a person goes to sleep, the body enters a state of rest. This means that the metabolic activities in the body slow down, and the demand for oxygen decreases.

3. **Oxygen Demand**: While sleeping, the body does not require as much energy as it does when awake. Since the energy production is lower, the demand for oxygen is also reduced.

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