Question

select the correct answer. how does the carbon locked in shells of marine organisms move back to the atmosphere? a. through subduction of deposits and volcanism b. through the process of respiration in these organisms c. through death and decomposition d. through the microbial process of ammonification e. through chemical reactions in acidifying oceans

Explanation:

When marine organisms with carbon - containing shells die, their remains accumulate on the ocean floor. Through subduction, these deposits are carried deep into the Earth. During volcanic eruptions, the carbon is released back into the atmosphere. Respiration in these organisms mainly exchanges gases within their life - processes and not the long - term return of carbon from shells to the atmosphere. Death and decomposition mainly cycle carbon within the ocean and soil ecosystems near the surface rather than directly to the atmosphere from shell carbon. Ammonification is related to nitrogen cycling, not carbon. Chemical reactions in acidifying oceans do not directly move carbon from shells to the atmosphere.

Answer:

A. through subduction of deposits and volcanism