What are camel humps used to store?
Contrary to popular opinion, camels store fat, not water in their humps. With a full hump, they can go four months without food when it is scarce. They do have various methods of making the most of scarce water. For example, their kidneys are very efficient at filtering out waste and reabsorbing water into the body, while their large noses conserve the moisture exhaled in their breath.
The correct answer is Fat.