Which is a guideline for label placement?

The guideline for label placement indicating that area labels should be positioned within the feature is focused on ensuring clarity and enhancing map readability. When labeling areas, such as polygons representing land use, lakes, or political boundaries, placing the labels within the area itself helps establish a clear association between the label and the geographic feature. This minimizes confusion for map readers and allows for efficient communication of information about what the area represents.

Positioning area labels correctly ensures they are visible and legible against the background of the feature, while also respecting the overall design of the map. Notably, features with varying shapes might require adjustments in label positioning to avoid overlaps with other elements, but the primary intent remains to locate these labels within the corresponding area.

The other options suggest alternative practices for labeling point features or line features, each serving different purposes. However, for area labels, the guideline strictly emphasizes placement within the feature to maintain geographic accuracy and visual effectiveness.