by size, shape and composition?
Answer:
Argentina and Brazil
Explanation:
The Iguacu river rises near the heart of the city of Curitiba. For most of it's course, the river flows through Brazil , however, most of the falls are on the Argentine side. below its confluence with the San Antonio River, the Iguacu river forms the boundary between Argentina and Brazil .
Answer:
the upper course, the middle course, and the lower course.
Answer:
It allowed for easier communication.
Explanation: When people speak the same language as you they are easier to understand.
