The diagram below shows several of the processes involved in the carbon cycle, but they are not labeled. Use the labels to correctly identify each process.

(left-to-right)

-

photosynthesis (by the patch of grass)

animal respiration (on top of the bull)

respiration (on top of the tree)

burning of fossil fuels (on top of the factory)

natural combustion (by the small fire)

a. to encourage apoptosis