An analysis of more than 500 contemporary languages has demonstrated that the number of speech sounds in a language decreases systematically a. with the culture’s distance from Africa along migration routes. b. with the level of education of the population. c. according to the cultural values embedded in the language. d. with the level of assimilation into larger cultures.

a. with the culture’s distance from Africa along migration routes.

Explanation:

There is research that conclude there is a relation in migration, this means the geography change of places with the phonem evolution. A phonen is the sound a letter. This means there is a relation between geographic location and lenguage modifications.

mali had been a state inside of the ghanaian empire. after ghana fell because of invading forces and internal disputes, mali rose to greatness under the leadership of a legendary king named sundiata, the "lion king." the songhai empire, already weakened by internal political struggles, went into decline.

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