The answer is tighten and contract.
In order for the students to pull the rope their muscles will need to tighten and contract so they are able to continuously pull with all their strength and power. Relaxed or twitched muscles will result in release of the rope.
Is their answers to choose from multiple choice I mean .
<span>SCHIZOPHRENIA - </span><span>Refers to a class of disorders in which severe distortion of reality occurs</span>
