Question

songhai was best known for a
thriving trade of imported
goods.

a diverse selection of
exported products

a system of taxation and
wealth distribution

a dictatorial government
that oversaw all aspects of
the empire

Explanation:

The Songhai Empire was known for its thriving trade, but more specifically, it had a diverse selection of exported products (like gold, salt, etc.). The other options: imported goods focus is less, the taxation/wealth system isn't its main fame, and it didn't have a dictatorial government overseeing all. So the correct option is the one with "a diverse selection of exported products".

Answer:

The option with "a diverse selection of exported products" (the middle - top option among the four boxes).