The answer is B. Shivering when Cold
Homeostasis is the maintenance of Stable Condition within the body
When we are experiencing a cold temperature, Our brain send a signal to our nerves to tighten and loosen really fast in order to create heat within our body. ( making it back to a stable temperature)
It is called a rep.
Hope this helps.
I'm pretty sure the answer would be: If the person is upright, carefully ease the person to the floor. this is of course after calling 911, followed by looking for the object lodged in the persons throat.
It might put stress on students. and also might make them sad because they cant see or physically interact with people. we can help people by FaceTiming and dropping off goods. hope this helps (: