Given a statement and question, generate the answer to the question such that the answer is contained in the statement.
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Question: statement: most species go through vulnerable stages after birthing, question: What stage do most species go through after birthing?

Answer: vulnerable


Question: statement: Most animals concentrate on feeding and growth after hatching., question: What do most animals concentrate on after hatching?

Answer: feeding and growth


Question: statement: genitalia are used in reproduction, question: What type of reproduction are genitalia used?

Answer:
reproduction