An example of an internal geologic process would be

Internal geological agents and processes are drive by the heat that is stored in the Earth's interior. They usually occur far from the surface. The main internal geological agent is the movement of the lithospheric plates. The most evident and catastrophic events caused by this movement are Earthquakes and volcanic eruptions. Others are the movement of the continents, the opening of new seas and the closing of old ones, or the formation of mountain ranges.

D. It would contain only one perspective.

Explanation:

Historians try to be objective and impartial, so it is not B.

A blog is a very personal platform, so it is not A.

From what I understood, it is not an academic blog, so it is not C either.