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.
One example: Question: Frilled sharks and angler fish live far beneath the surface of the ocean, which is why they are known as? Answer: deep sea fish
Solution is here: deep sea animals live deep in the ocean.
Explanation: This sentence is useful when answering the given question. The sentence provides the information that animals who live deep in the ocean are called deep sea fish. This is a good output. 

Now, solve this: Question: What is a source of energy for animals? Answer: nutriment.
Solution:
food is a source of energy for animals