Why would an engineer most likely use topography maps in his or her work? 1) to find an area used for camping 2) to define a political boundary line 3) to determine the best location for a new road 4) to find the ideal place to hike on a mountain

3) to determine the best location for a new road

Explanation:

Since the question indicates the person using the topography map is an engineer, we have to assume it's for a use related to work... otherwise the question would have said "someone".

1) to find an area used for camping

That's a valid use for a topography map, but not a work-related one.

2) to define a political boundary line

That's also a valid use of a topography map, but it wouldn't be used for that by an engineer, more like a politician since it would be about political border.

3) to determine the best location for a new road

YES.  That's a valid use and it's a professional use related to an engineer, a civil engineer in this case.

4) to find the ideal place to hike on a mountain

Another valid use, but not specific to work.

Turns out, all four possible answers are valid uses of a topography map, but only one related to engineer work.

c

Explanation: