Choices: 1). growth; 2). hydration; 3). repaired; 4). rest; 5). frozen; 6). plugged in; 7). enlarged; 8). staying warm;
Q: You are presented with the quiz "cells need to be what regularly to function properly" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "protein is used to repair cells by the human body" and "proteins are essential to the structure and function of cells". So, what's the best answer to the question?
A:
3).