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The term biosphere used for the zone of ...

The term biosphere used for the zone of earth where life exists is

A

lithosphere

B

hydrosphere

C

lithosphere and hydrosphere

D

lithosphere, hydrosphere and atmosphere

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Term "Biosphere":** - The biosphere refers to the global sum of all ecosystems. It is the zone of life on Earth, where living organisms exist. 2. **Components of the Biosphere:** - The biosphere includes several components: - **Lithosphere:** This is the solid part of the Earth, which includes the land and soil where organisms live. - **Hydrosphere:** This encompasses all water bodies on Earth, including oceans, rivers, lakes, and groundwater, which are essential for the survival of many organisms. - **Atmosphere:** This is the layer of gases surrounding the Earth, which provides essential gases like oxygen and carbon dioxide necessary for life. 3. **Combining the Components:** - The biosphere is formed by the interaction of the lithosphere, hydrosphere, and atmosphere. All three components are crucial for sustaining life. 4. **Identifying the Correct Option:** - Given the options: - A) Lithosphere only - B) Hydrosphere only - C) Lithosphere and Hydrosphere - D) Lithosphere, Hydrosphere, and Atmosphere - The correct option is **D) Lithosphere, Hydrosphere, and Atmosphere**, as all three are integral parts of the biosphere. ### Final Answer: The term "biosphere" refers to the zone of the Earth where life exists, which includes the lithosphere, hydrosphere, and atmosphere. Thus, the correct answer is option D. ---
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