What is the basic requirement of an ecosystem to function and sustain ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Ecosystem**: An ecosystem is a community of living organisms interacting with their environment, including both biotic (living) and abiotic (non-living) components.

**Hint**: Remember that an ecosystem consists of various living organisms and their physical surroundings.

2. **Identifying Basic Requirements**: The primary requirement for an ecosystem to function and sustain itself is a constant supply of energy. Without energy, the processes that support life cannot occur.

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