Which results in mechanical digestion in the stomach ? ( science )
A: contractions that mix and chum the food
B: waves of smooth muscle that push the food
C: hydrochloric acid that kills bacteria in food
D: pepsin that breaks down proteins into amino acids

Frankie is having difficulty developing a friendship with histeammate curtis. whenever frankie invites curtis to hangout with him at the park, curtis always says that he's busy.what is most likely preventing a healthy relationship fromforming? a)the boys are not being generous with their time andeffort.b)the boys are not communicating.c)both boys are too busy.d)the boys are on different teams.

During the past few weeks or months, have you noticed any exercises that have become too easy for you? do you think you need to increase the intensity in any of the three exercise areas in your workouts? evaluate your exercise progress in the three exercise areas (cardiovascular, resistance, and flexibility) and list what modifications, if any, you may need to make in your exercise routine.

Lifestyle diseases are caused by a combination of