List any four ways in which the skin serves as a protective layer for our body.

Explanation

### Step-by-Step Solution:

1. **Maintenance of Body Fluid Balance**:
- The skin helps to maintain the balance of body fluids by binding moisture and preventing excessive water loss through evaporation. This function is crucial for keeping the body's internal environment stable.

2. **Barrier Against Pathogens**:
- The skin acts as a physical barrier, protecting the body from various pathogens such as bacteria and viruses. It serves as the first line of defense in the immune system, preventing the entry of harmful microorganisms.

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