Cattle ranching is not common in the forest region of West Africa because of the _______?

Cattle ranching is not common in the forest region of West Africa because of the presence of tsetse flies. Tsetse flies transmit a disease called trypanosomiasis, also known as sleeping sickness, to cattle. This disease can be fatal and can significantly reduce the productivity of the cattle. Tsetse flies are prevalent in forested areas because they rely on forest animals for blood meals. As a result, the presence of tsetse flies in the forest region of West Africa makes it difficult for cattle to thrive, hence the limited occurrence of cattle ranching in the area.