Sea floor leveling.
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Answer:
Sea breezes occur during hot, summer days because of the unequal heating rates of land and water. During the day, the land surface heats up faster than the water surface. Therefore, the air above the land is warmer than the air above the ocean.
the first one is Equator and the second one is tundra should be the right answer sorry if it's wrong
Differences between Indus, Nile, and Yellow river valley civilizations are (please refer the attached image)
Learn more about the Indus, Nile, and Yellow valley civilizations here:
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The answer is A. Highland climate occurs mainly in the highlands where the lands are tall, in meters above the sea level then most of the most surrounding lands. These regions are characterized by high precipitation and cool temperatures because of the lands force warm air current up to the cooler atmosphere. The warm air current cool and their water content condenses and precipitates as rain.