Question

what would most likely happen to the carbon cycle if there were no more plants on earth? animals would consume more carbon. more carbon would be released from fossil fuels. carbon would build up in the atmosphere. animals would perform more photosynthesis.

Explanation:

Plants play a crucial role in the carbon - cycle by taking in carbon dioxide for photosynthesis. Without plants, there would be no mechanism to remove carbon dioxide from the atmosphere through photosynthesis. Animals do not perform photosynthesis, and the release of carbon from fossil fuels is not related to the absence of plants in terms of the immediate impact on the carbon - cycle. So carbon would build up in the atmosphere.

Answer:

Carbon would build up in the atmosphere.