Question

Which of these is an example of mechanical digestion? A food moving down the esophagus B teeth biting and grinding food into a paste C saliva softening food chemically in the mouth D nutrients being absorbed into the bloodstream​

Answer 1

Yeah I'd say B, mechanical implies (to me at least) a machine-like action, and/or a repeated action. The teeth are in a sense a machine. They repeatedly chew food until it's safe to be swallowed. I know your question was answered but I felt a little extra information wouldn't hurt. :)