___ is the process the body uses to break down food

Digestion

Explanation:

Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

yes it is weird but true