Final answer:
An application for a multilingual, multiethnic community is most suited for a user-interface based on images and international symbol-based icons, as it helps in overcoming language barriers and enhances accessibility.
Step-by-step explanation:
In which of the following interface applications might a user-interface based entirely on image and international symbol-based icons be most useful? An application for a multilingual, multiethnic community would benefit most from an interface that relies heavily on images and international symbols. This approach can help overcome language barriers and make the application more accessible to users from diverse linguistic backgrounds. In contrast, a school for the blind would require an interface that can be navigated via audio or tactile feedback, while applications for text-based search engines and statistical data entry would necessitate a text-centric interface for clarity and precision.