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.
Answer:
well first off i think the duckling would not know what to do because they dot see their mother or parents, i think the duckling will just have to live is own life from now on...
Explanation:
hope this helps i guess...
No. Mixing any sort of medicine together is never a great idea unless reccomended by a doctor.