What two things do people use the Sahel for

Sahel, Arabic Sāḥil, semiarid region of western and north-central Africa extending from Senegal eastward to Sudan. It forms a transitional zone between the arid Sahara (desert) to the north and the belt of humid savannas to the south. The Sahel stretches from the Atlantic Ocean eastward through northern Senegal, southern Mauritania, the great bend of the Niger River in Mali, Burkina Faso (formerly Upper Volta), southern Niger, northeastern Nigeria, south-central Chad, and into Sudan.

Explanation:

Sahel marks the physical and cultural transition between the continent's more fertile tropical regions to the south and its desert in the north.

Explanation:

the answer is option a.

he was able to speed up production of the processing of seeds