The region of the brainstem that plays a role in arousing you to a state of alertness would be the reticular formation. It is responsible in regulating the sleep cycles and in detecting sensory conditions. It consists of more than 100 neural network that are for various functions.
Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to earth from the sun is in the form of visible light. Light is made of waves of different frequencies.
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Your answer would be A. The earth element stays in the same area of the lithosphere, hydrosphere, or atmosphere where they originated when the earth was formed.
