Describe the location of the Trans-Saharan Trade Routes relative to at least two geographic features, continents, and/or regions

Trans-Saharan trade requires travel across the Sahara between sub-Saharan Africa and North Africa. While existing from prehistoric times, the peak of trade extended from the 8th century until the early 17th century. The Sahara once had a very different environment

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according to worldatlas.com, the u.s. has an 86% literacy rate.