Biosphere is

Options

A. Global ecosystem
B. Global community
C. Living organism
D. Count of organism on earth

Explanation

**Step-by-Step Solution:**

1. **Definition of Biosphere**: The biosphere is defined as the global ecosystem, which encompasses all living organisms on Earth and their interactions with the environment.

2. **Alternative Name**: The biosphere is also referred to as the "ecosphere," highlighting its role as a system that includes all life forms.

3. **Components of the Biosphere**: The biosphere includes both biotic (living organisms) and abiotic (non-living elements like air, water, and soil) components. However, the focus here is primarily on the biotic components.

4. **Layer of the Earth**: The biosphere is essentially the layer of the Earth where life exists. This includes various ecosystems, habitats, and communities of organisms.

5. **Conclusion**: Therefore, the biosphere can be summarized as the global ecosystem that includes all living organisms and their interactions within the environment.

**Final Answer**: The biosphere is the global ecosystem.

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