Explain mastication peristalsis segmentation and the release of hormones and enzymes necessary for digestion

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

i wish i could with all of them i can barley see the first one so here's the answer to the first one b

yes, because even though a theory has a  lot of evidence to support it, it is not always true

you have the answer? i really need it