Which of the following describes a negative feedback loop

Ididnt have which of the following as an option. but a negative feedback loops occur in your body through its own internal controller for maintaining temperature ph, hormone levels, blood sugar and other internal variable levels of homeostasis, which is the optimal internal state at which your body operates

The Answer is 2, 3, and 5. Thank me when you get that 100%!

Explanation:

I got it right on the test