What are lifestyle diseases ? How are they caused ? Name any two such diseases.

Explanation

### Step-by-Step Solution:

1. **Definition of Lifestyle Diseases**:
Lifestyle diseases are health conditions that are primarily related to the way an individual lives. These diseases are often a result of unhealthy habits and choices that affect one's overall health and well-being.

2. **Causes of Lifestyle Diseases**:
- **Unhealthy Diet**: A major cause of lifestyle diseases is the consumption of unhealthy foods, such as junk food, which are high in sugars, fats, and calories but low in essential nutrients.
- **Lack of Physical Activity**: Sedentary behavior, where individuals do not engage in regular physical exercise, contributes significantly to the development of these diseases. A lack of movement can lead to various health issues.
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