We Use It Differently at Different Times; as Density Increases

We use it differently at different times; as density increases, we do not always act aggressively; it aids in providing food, shelter, recreation, etc.; we maintain several; humans are the only ones who "visit" without antagonism; and we usually have more territory than we need to survive. What do these issues refer to?

A) How humans use territory purposively.
B) The factors that can create a perception of crowding.
C) The reasons why territory is important.
D) The issues that seem to affect how we react to territorial invasions.
E) None of the above.