What is the mainly balance within, as environment changes?

I don't completely know how to answer this question, but i believe you are referring to homeostasis, Which is your body's way of maintaining the same internal temperature, such as sweating when hot and shivering when cold.

lysosomes contain a variety of enzymes, enabling the cell to break down various biomolecules it engulfs, including peptides, nucleic acids, carbohydrates, and lipids (lysosomal lipase). the enzymes responsible for this hydrolysis require an acidic environment for optimal activity. hope i !