What is an example of a native link in the mobile event app?

A native link in the mobile event app is one that directs users to specific content or functionality within the app itself, rather than to an external website or resource. In this case, the correct choice, "nx://attendees," employs a schema that is understood by the mobile application. This means that clicking on this link will trigger actions within the app, such as navigating to the attendees section, without needing to exit the app.

The other options represent different types of links. The link beginning with "http://" directs users to an external website, which would not be considered native to the app environment. The "app://" link could potentially be usable within certain applications but doesn't specify a native context for the mobile event app specifically. Meanwhile, the "file://" link typically points to local files on the device and is not intended for navigating within app interfaces. Thus, "nx://attendees" best exemplifies a native link that aligns with the app's internal navigation and functionality.