What is true regarding the functionality of Drop Downs?

The statement about restricting selection to only one value is accurate when it comes to the functionality of Drop Downs in user interface design. Drop Downs are designed to allow users to select a single option from a pre-defined list. The user interaction model for a Drop Down entails clicking on the field, which reveals a list of choices; from this list, the user can then select only one option at a time.

This is distinct from other selection methods like multi-select lists or checkboxes, which enable multiple selections. Understanding this core functionality helps in designing user interfaces that are intuitive and user-friendly, ensuring that users can easily make selections without confusion regarding how many options they can choose.

In contrast, the other statements about Drop Downs would not accurately represent their designed behavior or capabilities. For instance, they do not allow multiple selections, do not inherently support the display of images alongside options, and although it's possible to populate Drop Downs from a database or other data sources, this is not a fundamental functionality of Drop Downs themselves, but rather a feature dependent on configuration and design.