Answer:
I'm pretty sure the answer is 4.
Explanation:
1 and 2 are definitely homeostasis because it is a way to keep your body balanced how it needs to be and 3 would be a natural reaction that your body would make to prevent further pain, but 4 would be a personal choice that is made by the person who stays up.
B. I did a project on scorpions a few years back.
Ice sheets, ice caps and glaciers, the floating sea ice of the polar regions, lake ice, snow on the ground, and permafrost, permanently frozen ground in northern latitudes, all make up the cryosphere. ... It helps cool our planet and controls global sea level. It affects ocean currents and storm patterns around the world.
