Give two examples of artificial or man made ecosystems. List the salient features by which they differ from natural ecosystems. 

Explanation

### Step-by-Step Solution

1. **Identify Two Examples of Artificial Ecosystems**:
- The first example of an artificial ecosystem is an **aquarium**.
- The second example is a **farmhouse**.

2. **Define Artificial Ecosystems**:
- Artificial ecosystems are man-made environments where both biotic (living organisms) and abiotic (non-living elements) components are controlled and maintained by humans.
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