The statement that geomorphic diversity, or the vast array of Earth's landforms, is shaped by both endogenic and exogenic processes is fundamentally true, representing a dynamic interplay of constructive and destructive forces.

Endogenic processes originate from within the Earth and are primarily responsible for creating initial relief and structural complexities. Plate tectonics, for instance, drives mountain building (orogeny) through continental collision, forming majestic ranges like the Himalayas. Volcanism builds volcanoes and extensive lava plateaus. Faulting leads to uplifted blocks and rift valleys, creating basin-and-range topography. These forces provide the foundational architecture and relief upon which external forces can act.

Conversely, exogenic processes operate on or above the Earth's surface, acting to modify, wear down, and redistribute the material shaped by endogenic forces. Weathering (physical and chemical) breaks down rocks into smaller fragments. Erosional agents like rivers, glaciers, wind, and waves then transport these sediments, carving out valleys, shaping coastlines, and sculpting deserts. Rivers create intricate drainage patterns, V-shaped valleys, and depositional features like deltas. Glaciers carve U-shaped valleys and cirques. Wind forms dunes and deflates basins.

The geomorphic diversity we observe is a direct consequence of the continuous struggle between these two sets of forces. Endogenic processes build up, creating the grand-scale features, while exogenic processes relentlessly wear down, refine, and reshape these features, creating an ever-evolving and diverse tapestry of landscapes.