Ahot sun warms the surface of a lake on a calm day. what will happen to the cold water at the bottom of the lake?     a. the cold water at the bottom will rise up and mix with the warm water at the top.    b. the warm water at the top will sink down and mix with the cold water at the bottom.    c. the cold water will remain at the bottom and will not mix with the warm water at the top.    d. both a and b are true.

Hurry i need your (100 points) 1) what are the responsibilities of the region of the brain highlighted below? (picture located below) the highlighted portion is at the rear base of the brain, behind the brain stem. regulating homeostasis, hunger and eating, thirst and drinking, and many other functions of basic survival. coordinating movement and balance by using information from sensory nerves, including hand-eye coordination. controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities. regulating important involuntary bodily functions such as blood pressure, heart rate, breathing, and swallowing. 2)which of the following systems or structures is correctly paired with its function? neurons - brain cells that control thoughts, calculations, and memory cerebral cortex - portion of the brain that controls involuntary body movement peripheral nervous system - carries impulses to and from the central nervous system central nervous system - carries information from the nerves to the muscles and glands