Why is the savanna climate the what it is?

The savanna climate is characterized by distinct wet and dry seasons, primarily due to its location near the equator and the influence of tropical and subtropical high-pressure systems. During the wet season, intense rainfall occurs as the Intertropical Convergence Zone (ITCZ) shifts, bringing moisture-laden winds. In contrast, the dry season results from the retreat of the ITCZ and the dominance of dry air masses. This climate supports a unique ecosystem of grasses and scattered trees, adapted to the seasonal variations in moisture.