Which aspect of a map indicates particular type feature or activity which is usually explained in the legend?

Symbols on a map indicate particular type feature or activity which is usually explained in the legend. Map symbols are used to represent various features on a map, such as roads, rivers, buildings, and landmarks. These symbols are standardized and are explained in the map legend, which provides information about what each symbol represents. By referring to the legend, users can understand the meaning of the symbols and interpret the information presented on the map.