Verified Answer :

rachelskittles

Pepsin works the best in the stomach because it has the optimum pH of 2.

saadhussain514

ANSWER:

Pepsin

EXPLANATION:

Pepsin is a proteinase which breaks down proteins into smaller peptides that is a protease It is constructed in the stomach furthermore it is one of the foremost digestive enzymes in the digestive systems of humans and various other animals, where it supports digest the proteins in food.