Answer:
Ghana, Mali, and Songhai.
Explanation:
The 50 year old is the answer, just took this test.
Neolithic villagers developed centers of agriculture growing wheat, barley, and other crops. Farmers along the Yellow River cultivated millet and later on domesticated wild rice. Farmers in the Central Andes were the first to grow tomatoes, sweet potatoes, and white potatoes. Neolithic also began to build more permanent structures to live in
