What is the best description of physical geography's focus?

The best description of physical geography's focus is on the Earth's climate and surface processes. Physical geography is primarily concerned with understanding the natural environment, including landforms, climates, ecosystems, and the processes that shape the Earth. It examines how physical features like mountains, rivers, and deserts are formed and how they interact with human activity.

This focus includes the study of climate patterns, weather phenomena, soil composition, and natural resources. By analyzing these elements, physical geography provides insights into environmental processes and their impacts on both natural ecosystems and human societies. In contrast, the other options pertain more to human geography or socio-economic studies, which examine human relationships, governance, and economic systems rather than the physical characteristics of the Earth itself.