Choose from:
(I) photosynthesis
(II) sweating
(III) vitamin C
(IV) batteries
(V) methane
(VI) glucose
(VII) sugar
(VIII) lipids

Fact 1: Organisms use lipids to store energy.  Fact 2: Plants and animals are organisms.  Given the two facts above, what do animals use for energy storage?
Answer:
(VIII)