Concept:Identifying the most commonly cultivated cash crop in the El Juf Basin of Mali.
Explanation:Mali is a West African country where agriculture is the backbone of the economy.
The El Juf Basin is one of the recognised farming zones in Mali, particularly for cash crop production.
Cotton is grown extensively in this basin because the climate and soil conditions support its cultivation.
It is an important raw material for the textile industry and contributes significantly to Mali's export earnings.
The other options, cashew, cocoa, and coffee, are not characteristic crops of this basin in Mali.
As a result, cotton stands out as the major crop of the region.
Answer:A. Cotton