a map showing the routes of city buses a map showing the locations of streets a map showing the locations of houses a map showing the elevations of ground surfaces
An engineer is analyzing which areas in a city might become flooded if there are heavy rains. Which of the following maps is best to use for this analysis?

Options:
- a map showing the routes of city buses
- a map showing the locations of streets
- a map showing the locations of houses
- a map showing the elevations of ground surfaces

a map showing the elevations of ground surfaces