Give three examples of fresh water ecosystem.

Explanation

### Step-by-Step Solution:

1. **Understanding Freshwater Ecosystems**: Freshwater ecosystems are environments where the water has a low salt concentration, typically less than 1%. They are crucial for supporting a variety of life forms and play a significant role in the Earth's ecology.

2. **Identifying Examples**: To answer the question, we need to identify specific types of freshwater ecosystems.

3. **Listing Examples**:
- **Lakes**: These are large bodies of freshwater surrounded by land. They can vary in size and depth and support diverse aquatic life.
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