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

Christine, a three-year-old child, often wears her mother’s shoes and carries her bag while pretending that she is going shopping. sometimes christine copies her mother in the kitchen by stirring in empty pots. which type of developmental change is christine experiencing? a- social and emotional b- psychological c- physical d- cognitive

List three reasons people may begin using tobacco

This is a negative reaction to food that doesn’t involve the immune system