In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
Q: The Sahel (/ shl /) is the ecoclimatic and biogeographic zone of transition in Africa between the Sahara to the north and the Sudanian Savanna to the south. Having a semi-arid climate, it stretches across the south-central latitudes of Northern Africa between the Atlantic Ocean and the Red Sea. The name is derived from the Arabic word sahil (, Arabic pronunciation: (sail)) meaning 'coast' or 'shore' in a figurative sense (in reference to the southern edge of the vast Sahara), while the name Swahili means 'coastal (dweller)' in a literal sense.
A:
what is the difference between sahel and sahara