Whose job is it to release the carbon that remains in the bodies of dead organisms? A producersB carnivores C herbivores D decomposers

The decomposers use the carbon stored in the bodies of dead organisms for their own bodies, and also release carbon as carbon dioxide into the atmosphere through cellular respiration. Animal shells can turn into rock-like limestone after a very long time. Likewise, carbon can be returned to the atmosphere as carbon dioxide if dead organisms are burned in a forest fire or burned by people to create heat and fuel.

Hence the answer is D decomposers

The answer is D: decomposers.