The key difference between a reference map and a thematic map is that a reference map primarily displays locations and geographic features, providing general information about the area, while a thematic map focuses on a specific theme or subject matter, presenting data related to that theme (such as population, climate, or economic activity) in relation to geographic boundaries.
Given the options you've provided, the correct choice focuses on the distinct purposes of the two types of maps. However, none of the responses fully capture that difference. If you need to select an answer from the provided responses, it looks like they may not accurately reflect the actual distinctions. Generally, you would emphasize that thematic maps present specific data related to characteristics of a location, while reference maps provide broader geographic context.