How does a whale-fall community affect ocean sediment?
a. the decomposition of the whale enriches the sediment.
b. the remains of the whale pollute the sediment.
c. the sediment is transformed into food for mussels and crabs.
d. the bacteria that are attracted break down the sediment nearby.

The answer is A. The decomposition of the whale enriches the sediment.

When a whale dies, it falls to the ocean floor. Its dead body is known as whale-fall. This whale-fall provides nutrients for a whale-fall community, which includes bacteria, crabs, worms and other invertebrates. Organic fragments from the whale-fall enrich the sediments nearby. Enrichment opportunists colonize the whalebone and surrounding sediment in order to feed on these organic fragments.

A.

Explanation:

what he said...

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.