TASK DEFINITION: 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.
PROBLEM: Question: Which statement best describes the Law of Superposition? 
Answer: In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks. 
Sentence: The law of superposition is best described by: in undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.

SOLUTION: If layers of sedimentary rock have not been disturbed, the Law of Superposition tells us that the lowest layers will contain older rocks than the higher layers.

PROBLEM: Question: Which gas is given off by plants? 
Answer: Oxygen. 
Sentence: Oxygen gas is given off by plants.

SOLUTION: Oxygen gas is produced by plants.

PROBLEM: Question: Which is an example of a renewable energy resource? 
Answer: biomass. 
Sentence: Biomass is an example of a renewable energy resource.

SOLUTION:
An example of a renewable energy resource is biomass.