Aphysical geographer would most likely study all of the following subjects except

The physical geographer works or studies the physical systems, climatology, botany or even zoology, but not the political systems.

Explanation:

The physical geographer would concern to the field relative to the physical geographical feature or nature, which includes the subject of physical systems, climate and flora of the given options. Climatology is concerned as the physical systems are in very much relevance to the pattern formation of climate.

Presence and distribution of flora causes the formation of many distinct populous zone and hence physical system. Political systems whereas are in concern about the polity of the nation or area and how well or structure of the governance works.

the climate of each region is different from one another.

a. i. only is correct.