Which is an example of and internal stimulus 99 pts giveaway

Anything that your brain reacts to that comes from inside your body whether that be emotions (hormones) hunger, pain, etc.

A few examples is hormone levels, sensations of anxiety, hunger and changes in vital signs like the blood pressure either rising or getting low. Also some things that you feel. like feeling scared, thirsty cold, hot, and other more examples.

Explanation:

I asked my brother so idk :)

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .