Proteins that are consumed as part of the diet are digested into single amino acids, absorbed in the small intestine, and transported via the portal vein to the liver. Fill in the blank about protein digestion. Proteins are denatured by hydrochloric acid in the
1. stomach
2. pancreas
3. liver
4. mouth small intestine

Stomach

Explanation:

The digestion of protein starts in the stomach, where HCl and pepsin break proteins into smaller polypeptides, which then travel to the small intestine

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.