How and where did Mali get its salt?

Camels, known as the "ships of the desert," carried salt from the northern mines in the desert to be traded for gold and other goods such as kola nuts and grain from the southern part of the Mali Empire.

Explanation:

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answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44