instruction:
In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.
question:
Question: Birds give birth to their babies while still in an egg. Mammals, however, give birth to their babies? Answer: already alive.
answer:
mammals give birth to live young


question:
Question: Nectar is used to attract pollinators to what? Answer: flora.
answer:
nectar is used for attracting pollinators by plants


question:
Question: The substance that the respiratory system takes in from the air is released by? Answer: plants.
answer:

the respiratory system takes in oxygen from the air