There are only so many resources that can be used and if all of them are used they don't have enough materials or food.
Answer:
Chimpanzee
Explanation:
CHIMPANZEES. RECKONED to be the most-intelligent animals on the planet, chimps can manipulate the environment and their surroundings to help themselves and their community. They can work out how to use things as tools to get things done faster, and they have outsmarted people many a time.
The answer is B. feelings of hunger
