The adverb is either because it helps describe the sentence more.
Hypermedia - An animated tv show.
Linear multimedia - An online dictionary.
Nonlinear multimedia - An interactive information kiosk at an airport.
Service is being an active helper in the community and taking action that can be of benefit.
An indirect source is when you quote a source that is cited in another source
Since you didn't post choices... This is the best way I can help you