If the earth did not have internal energy, which of the following carbon cycle process would not be possible?

a. respiration

b. consumption

c. rock formation

d. burning fossil fuels

If the Earth did not have internal energy, the carbon cycle process which would not be possible is: C. rock formation.

Carbon cycle can be defined as the series of biogeochemical processes through which atoms of carbon or carbon compounds are interconverted and used within an environment, by transporting carbon from the atmosphere to the Earth and then back to the atmosphere.

Basically, the four (4) main processes associated with carbon cycle include the following:

Of all the aforementioned processes, only rock formation requires that the Earth has sufficient internal energy for the movement of materials around the core and the mantle, thereby, leading to gradual but significant changes within the Earth's crust.

Read more: link