Final answer:
The two basic concepts that help geographers to explain why every point on earth is unique are absolute location and relative location.
Step-by-step explanation:
The two basic concepts that help geographers to explain why every point on earth is unique are absolute location and relative location.
Absolute location refers to an exact point on the earth's surface without regard to how that point is related to any other place. It helps geographers accurately locate and identify features on the earth's surface using coordinates measured in degrees of latitude and longitude.
Relative location, on the other hand, is the location on the earth's surface with reference to other places. It takes into consideration features such as transportation access or terrain. Geographers use relative location to compare the advantages of one location with those of another.