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.

Carbon would build up in the atmosphere.

Explanation:

If there were no more plants on earth the carbon would build up in the atmosphere. This is because of the fact that plants use carbon dioxide present in the atmosphere along with water from the roots to produce food in the form of carbohydrates and oxygen. This process is called as photosynthesis. As they absorb the carbon dioxide from the atmosphere they are called as carbon sinks. In the absence of plants the abundance of carbon dioxide gas in the atmosphere will increase which is a greenhouse gas. The carbon dioxide will trap the heat energy from the incident sunlight and this will lead to increase in the global temperatures.

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