I'm in middle school, but I think I know the answer, I am sorry if I am wrong.
It's D
<span>C. As a metal comb is held near an object with a negative charge, the comb becomes charged.
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Answer:
Rectilinear propagation describes the tendency of electromagnetic waves to travel in a straight line. Light does not deviate when travelling through a homogeneous medium, which has the same refractive index throughout; otherwise, light suffers refraction.
Thick cloud cover over the whole of planet Earth would block out sunlight from reaching the surface. This means that it would lower the temperature on the Earth's surface.
