Write geographical reasons.

There are no west-flowing rivers in Brazil.

A number of rivers take off from the terminal portion of the highlands and flow northwards to meet the Atlantic Ocean which lies on the eastern border of Brazil. Some major rivers like Uruguay, Paraguay, and Parana originate from the southern slopes of the highlands and enter Argentina. The highlands gradually slope towards north which appears in the form of an escarpment. Hence, there are no west-flowing rivers in Brazil.