Concept:The Kanem-Bornu Empire was a major pre-colonial state whose wealth came from trans-Saharan trade.
Explanation:Kanem-Bornu controlled key trade routes across the Sahara Desert.
It exchanged goods such as salt, textiles, and horses for gold, ivory, and slaves.
This trade brought great wealth and made the empire a powerful centre of commerce and Islamic learning.
Its location in the Lake Chad region linked North Africa with the central Sudan and the Nigeria Area.
These features distinguish it from the other options, which were not primarily known for trans-Saharan trade.
Answer:A. Kanem-Bornu Empire