The average adult needs about seven to eight hours of sleep per 24-hour day.

the answer is the

it is a good conductor

explanation:

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

i believe that it is a exoplanet