Physical geography is the branch of geography that focuses on the natural features of the Earth. It studies landforms, climates, vegetation, and ecosystems, examining how these elements interact with each other. Key topics include mountains, rivers, deserts, and forests, as well as processes like erosion and weathering. This field also explores how physical features influence human activities and settlements. For example, the presence of a river can affect where people build cities, while climate determines the types of crops that can be grown in a region. Understanding physical geography helps us appreciate the Earth's diverse landscapes and environments.