The _________________ is the thin layer of Earth's atmosphere where life exists. (1 point) Responses [Choice A] geosphere [Choice A] geosphere [Choice B] atmosphere [Choice B] atmosphere [Choice C] biosphere [Choice C] biosphere [Choice D] hydrosphere

The correct answer is [Choice C] biosphere.

The correct answer is Choice C: biosphere. The biosphere is the thin layer of Earth's atmosphere where life exists.

The correct answer is [Choice C] biosphere. The biosphere is the thin layer of Earth's atmosphere where life exists.

To find the answer to this question, one can start by understanding the definition of the terms given as choices. The geosphere refers to the solid part of Earth, including rocks and minerals. The hydrosphere refers to all the water on Earth's surface, including oceans, rivers, lakes, and groundwater. The atmosphere refers to the layer of gases surrounding the Earth. The biosphere refers to the parts of Earth that can support life, including the atmosphere, hydrosphere, and geosphere.

By understanding the definitions of these terms, we can rule out choices A and D (geosphere and hydrosphere) since they do not specifically refer to the layer of Earth's atmosphere where life exists. Next, we come to the choice B, atmosphere, which does refer to the layer of gases surrounding the Earth but does not explicitly mention life. Finally, we have choice C, biosphere, which includes the atmosphere and specifically refers to the layer where life exists.

Therefore, the correct answer to the question is [Choice C] biosphere.