Which of the following explains why it is necessary for the body to eliminate waste?

to allow body to maintain current in balance
to keep the internal enviroment in balance
to make room for nutrients coming in

mammal

explanation:

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.