Final answer:
Map legends are used to understand the a. colors and symbols on maps, detailing geographical features and helping users interpret distance scales and directions.
Step-by-step explanation:
People use map legends to understand the colors and symbols on maps. The best answer from the choices provided is (a) colors and symbols. Map legends are a key feature on maps as they explain the meaning of different symbols, which may represent cities, natural landmarks, or other points of interest.
Also, the legends define the colors used on maps, which might correspond to different types of terrain, elevations, or other geographical aspects. Additionally, legends often include a scale that helps users interpret the ratio of distance on the map to the actual distance on the ground, and may provide both kilometers and miles.
For orientation purposes, a map would typically feature a compass direction, often with an arrow pointing north, and possibly latitude and longitude. These elements allow users to accurately determine their location and direction on the map.