Explain the role of cellular respiration and decompostion in the carbon cycle. i need the answer quick btw (dont plagiarize)

The goal of cellular respiration is to produce carbon dioxide by using oxygen. The final product can be used later on for photosynthesis.

The second process requires carbon being put back into the process it used to be in, unlike when it was in any dead organism. Waste products are broken down through this never ending product. The main goal of decomposition through the carbon cycle is to free carbon through another process called cellular respiration.

Ithink it’s c or b for the answer.