The human body can store 350-500 grams of glycogen in the body.
Explanation:
The glucose present in the body provides energy. The glucose each gram is changed to 4 kilo calories of energy which can be easily utilized by the body. The stored glycogen provides energy by converting to glucose. The muscle consist of around 400 gm of glycogen and the liver consist of 100 gm of glycogen.
The muscle uses this stored glycogen at the time of energy requirement. The liver also act as a reservoir of glycogen.
I think C) availability of water is your best answer because alot of organisms count on water as a major resource because they need it to survive so a lack or a gain in the amount of water will majorly effect an ecosystem.
