Which of the following contribute to the carbon cycle?

A. Respiration

B. Photosynthesis

C. Fossil fuel combustion

D. All of these

Answer: Option D

Solution(By Examveda Team)

Respiration, Photosynthesis and Fossil fuel combustion contribute to the carbon cycle.
Terrestrial plants fix atmospheric CO₂ through photosynthesis, returning a fraction to the atmosphere through respiration.
Carbon dioxide is removed from the atmosphere primarily through photosynthesis and enters the terrestrial and oceanic biospheres.
Burning fossil fuel also releases large amounts of gases along with carbon dioxide.