List any four causes of diseases.

Explanation

### Step-by-Step Solution

1. **Infection Due to Poor Health**: Poor health can lead to a weakened immune system, making the body more susceptible to infections and diseases. When the body is not in optimal health, it cannot effectively fight off pathogens.

2. **Lack of Proper Nutrients**: A deficiency in essential nutrients can result in various health issues. Without adequate nutrition, the body may not function properly, leading to diseases related to malnutrition, such as scurvy or anemia.

3. **Lack of Public Services**: Insufficient public services, particularly in sanitation and hygiene, can contribute to the spread of diseases. Poor sanitation can lead to contaminated water and food, which can cause infectious diseases.

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