What content type is specifically used to enhance a web map through data display?

The correct choice is layers, as they are fundamental components of web maps that allow for the display of various types of geographic data. Layers can represent different datasets, such as point features, lines, polygons, or raster images, and they can be combined to provide a comprehensive view of the spatial information. By adding multiple layers to a web map, users can visualize relationships between different data elements, analyze trends, and gain deeper insights into the information being presented.

Scenes, on the other hand, are used to represent 3D visualizations of data, which may not be applicable to all web maps. Groups serve as organizational tools within the mapping environment, allowing users to bundle multiple layers together for easier management but do not directly contribute to the display content. Apps are interactive applications that can utilize maps and layers but are not themselves a type of content that enhances a web map.