What do organisms from the ocean use the carbon dioxide for?
a. to breathe
b. to build bones
c. to make shells
d. to organisms decompose

To make shells (Ans. C)

Explanation:

Carbon dioxide from the atmosphere dissolves in the water present in the ocean. Organisms in the ocean use carbon to make calcium carbonate, which is building material of shells of organisms. Organisms that use calcium carbonate for protection and structure are known as calcifying organisms.

a. population growth is decreasing

-2

+4

-10

-3

-8

-3

so the population decreased by 24 because 3+3+8+10+2=26-2=24.

hoped i !

explanation: