I think that the "dominant" culture here is the Spanish-language, Latino culture, which is slowly taking over the indigenous cultures, for example by replacing their languages and religion (Christianity instead of the indigenous religions).
I would finish the sentence with "culture" or "religion" or "self-esteem".
Answer:
the part of the world that is between these two lines, where the climate is hot and wet
Commodities traded in the Silk Road included Silk, Textiles, there was also wines and fruits that were traded, and a notable thing that was traded then was ivory.