Answer:
Greenhouse effect
Explanation:
Greenhouse effect is the trapping of the sun's warmth in a planet's lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.
Georgia, Moldova, Montenegro
The correct answer is B. Medium. This is because to travel through the ear, the sound wave must go through the ear drum.
The answer is: [A]: troposphere .
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