Which minerals led to the rise of trade kingdoms in West Africa? 1)Gold and salt 2)Diamonds and salt
3) Manganese and gold
4)Phosphates and manganese​

Analyze the photo below and answer the question that follows. photo by perry quan what kind of service does the facility in the photo above provide, according to christaller's central place theory? a. low-order service b. high-order service c. low-growth service d. specialized-need service