Geography is hard to define accurately yet concisely. Of course, maps are at its very heart. But making maps is the business of cartographers. Likewise geologists, not geographers, study the earth proper, and thus is a whole different domain with its own specialization. Yet another field, demography, concerns populations and their statistically detailed properties. For example, this is important for a country’s census. “Geography” could merely mean how close things are from one another. However you define it, people at least conceptually know it means.
The puzzle, has some neat odds and ends, perhaps due to its age. That gets interesting. This map depicts various defunct state borders (or lack thereof!). Among those are the Soviet Union (USSR), Czechoslovakia, East & West Germany, Yugoslavia, and yes, Korea! Given that, the undivided Korea attests to this map being designed (but probably not made) before 1950.
Moreover, within continents, it was regionally divided (and beyond). You can see historical changes in this when compared against maps of older or newer publication.
And, if you know (at least the basics of) geology, throw that info in there. The Pacific “ring of fire,” along its shores, allows heavy duty mountainous activity, including volcanic forms. Among these mountain ranges and belts (i.e., compounds of ranges) include the Andes of South America, some smaller ranges in Mexico/Central America, the Rockies of the US and Canada, etc. And their windward slopes, which catch the ocean’s moisture, are far more fertile than the opposite slope, or the leeward.