Question

All living organisms are made up of carbon. The carbon cycle describes the movement of carbon as it is recycled and reused throughout the atmosphere. According to the diagram, carbon is constantly being exchanged between the plants, animals, surface and atmosphere.

Which of the following provides the BEST explanation about the carbon cycle?

A.
Carbon is removed from the ecosystem through decaying organisms.

B.
Carbon is removed from the ecosystem through respiration.

C.
Carbon enters the ecosystem only through photosynthesis.

D.
Carbon enters the ecosystem through respiration.

Answers

Answered by GPT-4o mini
The option that provides the BEST explanation about the carbon cycle is:

**C. Carbon enters the ecosystem only through photosynthesis.**

This statement highlights the primary way carbon enters the ecosystem, as plants (autotrophs) absorb carbon dioxide from the atmosphere and convert it into organic matter through the process of photosynthesis. The other options either inaccurately describe the carbon cycle or focus on processes that remove carbon rather than the main way it enters the ecosystem.

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