The last answer choice us D. Adding more of the chemical will hear the water but only up to a certain temperature

D. Adding more of the chemical will heat the water but only up to a certain temperature

Chemical changes are changes in the process that produce new substances that are different from the initial/ forming substances. Chemical changes are usually known as chemical reactions. So there are products/reactions and reactants and there is a change in the molecule/particle

The chemical reaction is usually followed by the release of heat, gas, change in color, precipitate substance etc

The heat that occurs in the addition of chemicals is caused by the reaction with water. But there is a constant rise in temperature when water reaches its maximum capacity to react with these chemicals.

Evidenced by the addition of 15 g and 20 g of chemicals, the temperature changes are constant

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

i think   the answer is c hope i'm right