Answer:
Homeostasis is defined as the process by which the internal body system maintains a suitable environment for its proper functions and survival.
When a person temperature drops a signal is sent to the brain which results in a reflex action being observed. The shiver makes the individual warmer and helps in the regulation of the body heat.
Only CH4 is covalently bonded. All other compounds are ionic compounds.
So A is the answer.
Hope it helps!
The direction of your shadow is going to change directions due to the moving of the sun
Weather satellites and Doppler radar, helps the process of looking over a large area, an does the network of weather observations.