select the correct answer from each drop - down menu. carbon, an important element for life, keeps cycling…

select the correct answer from each drop - down menu. carbon, an important element for life, keeps cycling between the spheres of the earth. carbon dioxide in the atmosphere is absorbed by the oceans and is used by aquatic organisms for biological processes. but aquatic organisms return some of it back through photosynthesis evaporation excretion

select the correct answer from each drop - down menu. carbon, an important element for life, keeps cycling between the spheres of the earth. carbon dioxide in the atmosphere is absorbed by the oceans and is used by aquatic organisms for biological processes. but aquatic organisms return some of it back through photosynthesis evaporation excretion

Answer

Brief Explanations:

Photosynthesis is the process by which plants and some other organisms use sunlight to convert carbon dioxide and water into glucose and oxygen. Evaporation is the change of a liquid to a gas and is not related to carbon - dioxide return by aquatic organisms. Excretion is the process by which organisms eliminate waste products, and aquatic organisms return carbon - dioxide back to the atmosphere through excretion.

Answer:

excretion