Instructions: 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.
Input: 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?
Output:
The species have similar bone structure.