Verified Answer :

The choices
for this question are:

a. Regions
are always unchanging and distinct in nature.

b.
Different perceptions of a region can make that region less defined.

c. A region
is an area on Earth that is defined by certain unifying characteristics.

d. Regions
are based on human perceptions.

Answer: d.
Regions are based on human perceptions

The
geographic theme of region considers the geographical location of an
area which is called a region. Thus, regions are not merely formed through
subjective perceptions but through all the other statements combined except

D