Question

What is the biggest obstacle to traveling by boat on the Congo River?

A. the many cataracts
B. the unusual path of the Congo River
C. shallow areas due to drought
D. the river's narrow width

Answer 1

The biggest obstacle to traveling by boat on the Congo River is
shallow areas due to drought
its world second largest river
there are many reasons as snakes and many more but main is the drought caused shallow areas
so option C is correct
hope it helps

Answer 2

The biggest obstacle to travelling by boat on the Congo River is : C. Shallow areas due to Drought

This shallow areas created a perfect environment for the water plants to grow, creating annoying obstacles for the boat

hope this helps