Homeostasis is maintained by negative feedback loops within the organism. In contrast, positive feedback loops push the organism further out of homeostasis, but may be necessary for life to occur. Homeostasis is controlled by the nervous and endocrine systems in mammals.
Solid water is less dense than liquid causing it to float while other substances are mainly more dense as solids.
D because the camel would try to avoid the sun
I believe it would be number 4