Which of the following statements are correct?

I. Geography as a scientific discipline was fully recognized after including the examination of why certain geographical patterns exist.

II. The process of spatial integration relates to how various geographical features are interconnected.

III. During the colonial period, the focus was primarily on inventorying natural and cultural features without delving into their interrelationships.

IV. Geography is solely concerned with the physical aspects of the earth, ignoring the human or cultural elements.