Answer:
The Aztecs and other Náhuatl-speaking indigenous peoples of Mexico all belong to the Uto-Aztecan Linguistic Group
Explanation:
The important natural resource in West Africa that the Songhai Empire controlled was salt.
This salt was predominantly found in the Sahara desert - there are still a lot of salt mines in this West African desert. The Songhai Empire heavily relied on salt trade, which brought most of its money into the empire - this is the reason why it was so powerful at the time - because of salt and gold.
I would say the Populist Party.