Final answer:
The Chaco region in Paraguay is known for quebracho trees, tannin production, and yerba mate.
Step-by-step explanation:
The region in Paraguay known for quebracho trees and the production of tannin for tanning leather, as well as being famous for yerba mate, a tea-like drink, is the Chaco region.
This region extends from northern Argentina into western Paraguay and features a landscape dominated by scrublands and subtropical forests. It has a wet season suitable for agriculture and a dry season that is ideal for raising livestock.