Final answer:
A topographic map primarily shows landforms by using contour lines to depict elevation changes, aiding in the identification of geographic features and potential hazards. Option number 2 is correct.
Step-by-step explanation:
A topographic map is designed to show one key element of the Earth's surface: landforms. These maps incorporate a three-dimensional perspective by utilizing contour lines to represent different elevations above sea level. Contour lines give readers detailed insights into the shape and features of the terrain, allowing individuals to identify various geological structures such as hills, valleys, and slopes.
Topographic maps are essential for a variety of practical applications including property acquisition, landscaping, outdoor recreation, and construction planning.
Moreover, these maps serve as an invaluable tool for understanding potential geologic hazards like landslides and floods. With their capacity to reveal how the land lies, topographic maps are crucial for anyone needing to assess the geography of an area for any number of reasons.