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.

[EX Q]: Sentence: Exotic species are also called invasive species because they threaten other species. Question: Why are exotic species also called invasive species?
[EX A]: threaten other species

[EX Q]: Sentence: The conclusion that two animal species evolved from a common ancestor in recent geological history is best supported by the observation that the species have similar bone structure. Question: Which of the following observations best supports the conclusion that two animal species evolved from a common ancestor in recent geological history?
[EX A]: The species have similar bone structure.

[EX Q]: Sentence: Solids are categorized by the forces holding the individual atoms, ions, or molecules together. Question: What is categorized by the forces holding the individual atoms, ions, or molecules together?
[EX A]:
solids