Question: Do you think the right answer to the question "what causes cancer?" is "smoking", given that  asbestos causes cancer?
Answer: No

Question: Do you think the right answer to the question "what can blow air?" is "gravity", given that  referees can blow air?
Answer: No

Question: Do you think the right answer to the question "what do some worms do to their hosts?" is "reproduce", given that  some worms kill their host?
Answer: