Final answer:
A topographic map would be the best type of map to show a researcher information about a country's physical geography.
Step-by-step explanation:
A topographic map would be the best type of map to show a researcher information about a country's physical geography. Topographic maps provide detailed information about the shape of the Earth's surface, including features such as hills, valleys, and cliffs. They use contour lines to represent elevation above sea level, allowing researchers to understand the physical landscape of a country.