Explain why multiple early hearths of domestication and diffusion of plants and animals across across the world in Central America, the Fertile Crescent, the Indus River Valley, and Southeast Asia.

You find a mysterious, dull substance on the ground and pick it up for a closer look. it is powdery, very light, and soft to the touch. the substance is most likely i. an organic mineral ii. a metallic mineral iii. a nonmetallic mineral i only ii only iii only i and ii i and iii