What type of molecule do animal cells use for a long-term energy storage?

Lipids

Explanation:

Lipids store about twice as much energy as carbohydrates Lipids are used for long-term energy storage whereas carbohydrates are used for short-term energy storage Lipids are insoluble whereas carbohydrates are often soluble. This means that lipids do not have an osmotic effect on organisms.

answer; i believe the answer is (polygenic inheritance;