Question

1. name one of the major tributaries of the amazon river.
2. what is the name of the famous waterfall system located on the brazil - argentina border?
3. which region of brazil is known for its dry and semi - arid climate?

Explanation:

1. The Amazon River has numerous major tributaries, such as the Madeira River.
2. The Iguazu Falls is a well - known waterfall system on the Brazil - Argentina border.
3. The Northeast region of Brazil is recognized for its dry and semi - arid climate.

Answer:

1. Madeira River
2. Iguazu Falls
3. Northeast region