You are given a question, its answer, and a sentence that supports the question, i.e., the answer to the question is inferable from the sentence. In this task, you need to paraphrase the given sentence so that the paraphrased sentence still supports the question i.e. you can still infer the answer to the question from the paraphrased sentence. Do not write a paraphrase with a minor change in the given sentence e.g. replacing the word "one" with "a". Instead, try to write a paraphrase that contains new words, i.e. the words that are not present in the input sentence.

[Q]: Question: What is the study of how forces affect the motion of objects? 
Answer: dynamics. 
Sentence: Dynamics is the study of how forces affect the motion of objects.
[A]: In Dynamics, we study how forces affect objects in motion.


[Q]: Question: What characteristic of carbon (C) makes it essential to living organisms? 
Answer: Carbon bonds in many ways with itself to form chains. 
Sentence: Carbon (c) is essential to living organisms because carbon bonds in many ways with itself to form chains.
[A]: By bonding with itself in many different ways, carbon forms chains and this means it is essential for living organisms.


[Q]: Question: How does the water cycle end? 
Answer: it repeats itself. 
Sentence: The water cycle ends with it repeats itself.
[A]:
Cycles repeat themselves when they end, and the water cycle is no different.