Which of the following reasons account for the low traffic on rivers in Africa?

The reason that accounts for the low traffic on rivers in Africa is the presence of rapids and waterfalls. Rapids and waterfalls pose obstacles and hazards to navigation and make it difficult and dangerous for boats and ships to travel along the river. As a result, the use of rivers as a transportation network is limited, and other modes of transportation such as roads and railways are preferred. In addition, many rivers in Africa have shallow channels, which further limit their navigability. While fishing is an important activity along many rivers in Africa, it does not account for the low traffic on rivers. Wide valleys and a change of color during rainy seasons are not factors that affect the traffic on rivers in Africa.