Answer:
stomata
Explanation:
Structures in plant leaves that open and close to maintain homeostasis are stomata.
<span>What muscle circles the eyes socket and closes the eyelid?
<span>The orbicular muscle</span></span>
Positive self talk or relaxation
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.