What does it mean if a resource is "open?"

The resource is an app available for download on mobile devices.

The resource is "freeware" provided by edtech companies.

The resource is available on the Internet.

The resource can be used, modified, and remixed by anyone.

A teacher observes the types $($active vs$.$ passive$)$ of digital learning activities she assigns to students and categorizes them by common groupings $($gender$,$ race$/$ethnicity$,$ language learner, disability$).$ What issue is she exploring?

If students have accessibility needs

If content is open

If a digital use divide exists

If cybercheating is occurring