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: I use a knife to chip away at what to make a sculpture? Answer: A slab of rock.
scraping an object may cause small particles to break off of that object

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

Question: You shiver when your body temperature drops, which happens when it is? Answer: Chilly.

cool temperatures cause animals to shiver