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.

Q: Question: Which is a complete circuit? Answer: a refrigerator that is running.

A: a complete electrical circuit is a source of electrical energy
****
Q: Question: In order for crops to grow food safely, pesticides are used on them. When it floods, this causes what to be poisonous? Answer: Runoff.

A: crop rotation renews soil
****
Q: Question: You can use plants like star anise for? Answer: sustenance seasoning.

A:
plants are the source of spices
****