Main causes of diseases are genetic disorder, infections and life style.

Answer

### Step-by-Step Text Solution:

1. **Understanding Diseases**:
- A disease is defined as a state of the body that is not in ease, indicating that there is some form of dysfunction or discomfort present.

2. **Identifying Main Causes of Diseases**:
- The question identifies three main causes of diseases: genetic disorders, infections, and lifestyle choices.

3. **Genetic Disorders**:
- Genetic disorders are diseases caused by abnormalities in an individual's DNA. These can include chromosomal abnormalities and hereditary diseases that are passed down from parents to offspring.

4. **Infections**:
- Infections are diseases caused by pathogenic organisms such as bacteria, viruses, fungi, or parasites. These pathogens invade the body and can lead to various health issues.

5. **Lifestyle Factors**:
- Lifestyle factors include behaviors and habits that can affect health, such as diet, physical activity, smoking, and hygiene. Poor lifestyle choices can lead to diseases such as obesity, diabetes, and heart disease.

6. **Conclusion**:
- The statement that the main causes of diseases are genetic disorders, infections, and lifestyle choices is accurate. Each of these categories encompasses a wide range of diseases and health issues.

### Final Statement:
- Therefore, the assertion that the main causes of diseases are genetic disorders, infections, and lifestyle is a true statement.

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