AP World History: Modern
A savannah is a mixed grassland ecosystem characterized by the trees being sufficiently small or widely spaced apart so that the canopy does not close. In the context of the Trans-Saharan trade routes, savannahs played a crucial role as they provided essential grazing lands for livestock and facilitated trade across the arid regions of North Africa and sub-Saharan Africa. These grasslands served as a transition zone between forest and desert, influencing the movement of people, goods, and cultures.