What is biosphere ?

Explanation

### Step-by-Step Solution:

1. **Definition of Biosphere**: The biosphere is defined as the part of Earth that is capable of supporting life. This includes all living organisms and their interactions with the environment.

2. **Etymology of the Term**: The term "biosphere" can be broken down into two parts: "bio," which means life, and "sphere," which refers to a spherical region. Thus, it can be interpreted as "the sphere of life."

3. **Composition of the Biosphere**: The biosphere encompasses all ecosystems on Earth. An ecosystem is a community of living organisms interacting with one another and their physical environment.

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