Physical geography is the branch of natural science which deals with the study of processes and patterns in the natural environment such as the atmosphere, hydrosphere, biosphere, and geosphere, as opposed to the cultural or built environment, the domain of human geography.
B is the best answer here because culture, nationality, history, and ethnicity are all directly tied to one's country (nation). Territory and boundary are not as specific, and state is too narrow.
Its goal is to supply enough food, housing, and other basics to meet the needs of everyone in the country. It also sets national priorities. These include mobilizing for war or generating robust economic equality
