Concept:Deserts are dry regions found where rainfall is extremely low, such as parts of the Sahara.
Explanation:Northern Mali lies within the southern edge of the Sahara Desert.
This area receives very little rainfall and has sandy, arid conditions.
The other options are not true desert locations.
Southern coast and Senegal have higher rainfall and greener vegetation.
Northern Nigeria is mostly savanna, not desert.
Therefore, the desert is found in northern Mali.
Answer:B. northern Mali