In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

Sentence: Lichens are not a single organism, but rather an example of a mutualism. Question: Lichens are not a single organism, but rather an example of a what?
mutualism

Sentence: Combustion reaction occurs when a substance reacts quickly with oxygen. Question: What occurs when a substance reacts quickly with oxygen?
combustion reaction

Sentence: Animals can transport the waste material known as urea in the circulatory system and store it safely at high concentrations. Question: Animals can transport what waste material in the circulatory system and store it safely at high concentrations?

urea