Is the regulation of internal conditions within a range that supports life processes.

Homeostasis.

Explanation:

Homeostasis may be defined as mechanism by which living organism maintain their external and internal environment. Homeostasis is an important property shown by the living organisms.

Homeostasis maintain the optimum conditions of the body. This regulates the internal environment withing a range that maintains and supports the life process. Receptors, chemical messengers are involved in the process of homeostasis.

Thus, the answer is homeostasis.

digestion

it excretes wastes