The Bantu migrations are most closely associated with the spreading of cultures in Africa
The bantu migrations refer to the Original African People which located in western Africa which migrated across the Current African continent, spreading their cultures along the way.
The Incas built irrigation systems
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Noun. cast fossil (plural cast fossils) A fossil formed when an animal, plant, or other organism dies, its flesh decays and bones deteriorate due to chemical reactions; minerals gradually enter into the cavity, resulting in a cast, which is in the general form of the original organism.
Explanation:
That my answer sana maka tulong