Given that on most topographic maps we can observe elevation difference, we can infer that the correct answer is 4. relief.
A topographic map is used to represent a certain area of land in regards to specific details pertaining to that area. These maps tend to include information useful for public workers such as:
- Power lines
- Buildings
- Elevations
- Forests
- pipelines
and much more.
These maps provide a variety of information in great detail, however, this information focuses on details of the land and it's structural contents. Therefore, it will not include information regarding air, climate or living organisms. The correct option is 4. Relief, given that this is a term used to define changes in elevations shown on a map.
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