The reason behind the destruction of the ecosystem in ancient West Africa is Gold mining. Hence, Option A is correct.
Gold is one of the most precious metals in the world and that is present in the mines that are available in South Africa, the USA (Nevada, Alaska), Russia, Australia, and Canada. Initially, the gold that is derived from the mines is in form of the pure, and native metal. The minerals that are known as gold-bearers are Sylvanite and calaverite.
Thus, gold mining or digging the gold from the mines is a process that has four steps and that is prospecting, mining, extracting, and refining. Basically, extraction of gold is done from the gold resources that are available. In ancient times, gold mining was not done in such a systematic manner that it is done in the present time.
The gold which is present in the present time, most of it or can be said as 80% of it is newly mined or recycled is used in jewelry manufacture.
Thus, option A is correct.
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