Which best defines homeostasis? a. modifying the external environment b. maintaining a stable internal environment
c. controlling what enters and exits the cell
d. movement of materials into the cell

b.maintaining a stable internal environment

Explanation: The purpose of homeostasis is to maintain a stable internal environment by careful regulation of bodily temperatures and other methods.

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B. maintaining a stable internal environment

Explanation: The purpose of homeostasis is to maintain a stable internal environment by careful regulation of bodily temperatures and other methods.

we would need to see the picture to answer it