Geomorphology is the scientific study of landforms, the processes that shape them, and their evolution through time. The discipline is based on several fundamental concepts that explain how the Earth's surface develops and changes under the influence of internal and external forces. These concepts provide a framework for understanding the origin, development, and modification of landscapes. The first fundamental concept is uniformitarianism, which states that the present is the key to the past. The same physical and geological processes operating today, such as weathering, erosion, transportation, and deposition, have been operating throughout Earth's history. This concept, developed by James Hutton and later popularized by Charles Lyell, forms the basis for interpreting ancient landforms. The second concept is structure, which emphasizes that geological structures significantly influence landform development. The type, arrangement, hardness, and attitude of rocks determine how landscapes respond to geomorphic processes. Folded mountains, fault scarps, and cuestas are examples of landforms controlled by geological structure. The third concept is process, referring to the natural mechanisms that modify the Earth's surface. Processes include weathering, mass wasting, river action, glaciation, wind erosion, coastal activities, and volcanic action. These processes continuously shape and reshape landscapes under varying environmental conditions. The fourth concept is stage or time, which recognizes that