Which term refers to the part of Earth where life exists, including land, water, and atmosphere?

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Multiple Choice

Which term refers to the part of Earth where life exists, including land, water, and atmosphere?

Explanation:
The main idea being tested is the global zone that supports life across all parts of Earth. The term describing this living layer is the biosphere. It includes all ecosystems and the organisms within land, water, and air, along with the interactions between them. The other terms refer to individual parts of Earth: the atmosphere is the blanket of gases surrounding the planet, the hydrosphere covers all water, and the lithosphere is the rocky outer shell. Those spheres are components of the whole, but only the biosphere specifically encompasses life across land, water, and air. So, biosphere is the best fit.

The main idea being tested is the global zone that supports life across all parts of Earth. The term describing this living layer is the biosphere. It includes all ecosystems and the organisms within land, water, and air, along with the interactions between them. The other terms refer to individual parts of Earth: the atmosphere is the blanket of gases surrounding the planet, the hydrosphere covers all water, and the lithosphere is the rocky outer shell. Those spheres are components of the whole, but only the biosphere specifically encompasses life across land, water, and air. So, biosphere is the best fit.

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