Answer:
3- C
4- B
5- A
Explanation:
C because our core is super hot and condensed, and the crust floats on the mantle. Convection currents move throughout the mantle pushing the crust.
B because weathering is a natural way of wearing away and breaking down rocks and soil. The others are just moving it.
And finally, letter A because river valleys mean fertile soil. Fertile soil is great for farming and raising crops and animals. Most of the greatest civilizations were in valleys such as:
the Chinese in by the Yellow River
the British by the Thames River
the Indians by the Ganges River
lots of civilizations by the Seine
plenty on the Nile
and so many along the Euphrates and Tigris.
They all had fertile soil around their banks making a crade for civilization.
