The answer is D. Cellular respiration
Decomposers because they decompose dead organisms, which releases the carbon.
An example of force that acts at distance is gravity and an example of contact force is pushing a chair across the room
In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 meters that photosynthesis is no longer possible. The aphotic, or “midnight,” zone exists in depths below 1,000 meters (3,280 feet).
