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.
Personal safety, pollution, and extreme tempuratures
Answer:
PLEASE MARK AS BRAINLIEST!!
Explanation:
Health education is very essential in order to protect oneself from fatal diseases. If we know the kind of food or climate to avoid then we can also protect our self from diseases.
We have to know the do's and dont's. Usually diseases also spread by contact and by having garbage near our houses which becomes the breeding ground for diseases.
So we have to educate ourselves to keep the environment clean and also maintain personal hygiene. We should have an yearly check up to know our body better.
Figuring out what causes of stress there are in our life is often very hard. When you are under pressure your body will react by making you more alert to specific elements, such as dangers. So if you are stressed, finding the cause or causes of stress (stressors) is even more difficult.