What was a factor in African trade across Sahara

Camels were a huge factor in trade across Africa! They usually traveled in groups to trade called caravans.

The West Africans exchanged their local products like gold, ivory, salt and cloth, for North African goods such as horses, books, swords and chain mail. This trade (called the trans-Saharan trade because it crossed the Sahara desert) also included slaves. Slaves would be taken to southern Spain as household servants.

Explanation:

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."

it granted civil rights to african americans.