Answer:
it is using black where the sun cant see in making it look more 3d
Explanation:
Civilizations first appeared in Mesopotamia (what is now Iraq) and later in Egypt. Civilizations thrived in the Indus Valley by about 2500 BCE, in China by about 1500 BCE and in Central America (what is now Mexico) by about 1200 BCE. Civilizations ultimately developed on every continent except Antarctica
The answer:Testes,they are male sex organs which produce the male gametes or spermatoza,abv. sperm.
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