The answers are:
a. physical geography
b. human geography
Geography is divided into two main branches, physical geography, and human geography, and after that, they branch out much more and include the other geographical disciplines in them.
Physical geography is mainly concerned with the study of the natural characteristics of the Earth, both the ones on the surface and the once close to the surface.
Human geography is mainly focused on the study of the human race, the background, perceptions, interactions, organizing, human groups, effects on and from the environment etc.
The most influential factors include the parent material (the rocks from which thesoil<span> has come), the </span>climate<span> and terrain of the region, as well as the </span>type<span> of plant life and </span>vegetation<span> present, and, of course, human influence. ... These </span>soils<span> but are less leached than the tundra </span>soils<span>.</span>
It had smaller population around 2 million
I think the answer is A.
But correct me if I’m wrong
I hope this helps :)