Given a scientific question, generate a correct answer to it.
--------
Question: What type of pollution comes from sewage, storm drains, septic tanks, boats, and runoff from yards?

Answer: municipal

Question: Plants have a touch response known as what?

Answer: thigmotropism

Question: In the chest, the trachea divides as it enters the lungs to form the right and left what?

Answer:
bronchi