Answer:
Maritime air masses
Explanation:
Maritime air masses form over water and are humid. Continental air masses form over land and are dry. Therefore, an air mass that develops over northern Canada is called a continental polar air mass and is cold and dry. One that forms over the Indian Ocean is called a maritime tropical air mass and is warm and humid.
The best and most correct answer among the choices provided by the question is the second choice "<span>It provided a sturdy foundation for homes. People had to control where it was deposited to ensure its supply."</span><span>
</span>Unlike Egypt, Mesopotamia<span> was inundated with a large amount of </span>silt<span>. This </span>silt<span> was a constant cause of problems in the man made irrigation systems.</span>
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Extraterrestrial bodies, specifically the stars
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