I know its not d but it might be c or a
Answer is C
This is because all insect's are exo skeleton which means they body is hard
It's because of hydrogen bonding among water molecules
Digestive enzymes<span> speed up reactions that break down large molecules of carbohydrates, proteins, and fats into smaller molecules the body can use. Without digestive </span>enzymes<span>, animals would not be able to break down food molecules quickly enough to provide the energy and nutrients they </span>need<span> to </span><span>survive</span>