A topographic map would be most useful in finding the lowest point in your city. A topographic map is a map that shows the relief of a certain area which means that it shows the elevations of certain areas through certain lines on the map. Because of this it is possible to see elevation changes on the map and ultimately determine high and low points in an area such as in your city. These other examples would most likely require a different kind of map.
A topographic map is most useful for finding the lowest point in your city (Option B). These maps use contour lines to represent elevation changes, allowing users to identify high and low areas easily. Other options relate more to climate or geological information, which require different types of maps.
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