A map would be the best choice to display "the landscape of a foreign country." Maps are specifically designed to represent geographical features, terrain, and spatial relationships, making them ideal for visualizing the physical characteristics of a place.
For the other options:
- The difference in the cost of two things is better represented through charts or graphs.
- Historical representations of what things looked like during a certain time period are best shown through timelines or visual illustrations.
- Important events are often best displayed using timelines or infographics rather than maps.