The breakdown of fats within the body is useful for .

a. protein synthesis

b. building amino acid chains

c. carbohydrate breakdown

d. building cell membranes

e. building nucleotides

D

Explanation:

Fats break down in the body and perform very important functions. It's the main function is the building cell membrane. Cell member is build-up mainly by fats (lipid) and protein. Hydrophobic ends of fats are outward of the cell membrane and hydrophilic ends are inward. Cell member is made up of lipid bilayer in which protein molecules are embedded.

rain is the best answer