Unlike fat, protein contains: 1)Carbon
2)Oxygen
3) Nitrogen
4) Hydrogen
HELPP PLEASE

C. Nitrogen

Explanation:

Fat contains Carbon, Oxygen, and Hydrogen, like protein. However, protein also contains Nitrogen which fat does not.

Hope this helped. :)

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.