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: Bears hibernate in winter because? Answer: the environment is colder and has less food.
answer:
seasonal changes are made in response to changes in the environment

question:
Question: Which of the following breathes? Answer: a zebra.
answer:
all animals breathe

question:
Question: Which form of travel causes the most pollution? Answer: driving.
answer:
using a car causes pollution