Compared to the newer interactive media, traditional forms of mass communication tend to be

Compared with newer interactive media, traditional forms of mass communication tend to be static.

They flow one way from a source to a mass audience with little scope for response.

Dynamic describes changing, responsive media, which fits the newer interactive kind instead.

Interactive names two-way exchange, again a trait of the new media, not the traditional.

Exploratory suggests user-driven navigation, which traditional broadcasting does not offer.

Interactivity is the key line dividing new media from the older one-to-many forms.