Respuesta :
Answer:
3. Break down food so nutrients can be absorbed
Explanation:
the reasoning is when you digest something your body is breaking down the food into small chuncks so that the nutrients can be absorbed easier
It would be #1&3. The digestive system is needed to break down food so nutrients can be absorbed. From there you body can create its energy.
not #2 - your mouth swallows not your digestive system
not #2 - your mouth swallows not your digestive system