What is a key feature of SWF file format?

The SWF (Small Web Format) file format is primarily known for its ability to support interactive animations. This format was developed by Adobe for multimedia applications, particularly those intended for the web. One of the defining characteristics of SWF files is their capability to incorporate vector graphics, audio, video, and interactive content, which allows developers to create engaging and dynamic user experiences.

Interactive animations can respond to user input, such as clicks, mouse movements, and keyboard actions, making SWF files a popular choice for games, web applications, and rich media content. This functionality distinguishes the SWF format and underlines its role in creating interactive web experiences.

The other options touch on aspects that do not align with the core functionalities of SWF files; for example, SWF files support audio, can be compressed for efficient storage, and do not exclusively utilize bitmap formats, as they primarily rely on vector graphics.