Geomorphology is the scientific study of landforms and the processes that shape them. It is derived from the Greek words "geo" meaning earth and "morph" meaning form. Geomorphology helps us understand geomorphological processes in different environments, detect natural hazards, identify landforms, and conduct coastal and river research. There are three main types of geomorphology: physical, chemical, and biological. The key geomorphic processes that shape landforms are erosion, transportation, and deposition, which involve the physical and chemical interaction between the earth's surface and natural forces.