are lipids that store energy and are typically composed of multiple building blocks containing three fatty acids attached to a glycerol molecule.

Fats are lipids that store energy and are typically composed of multiple building blocks containing three fatty acids attached to a glycerol molecule.

Explanation:

Fats, because they are a group of natural molecules that includes fats, waxes, sterols, and fat soluble vitamins.  

nucleus

would be most reasonable answer tbh