When the media chooses not to report on a particular idea or story, which form of influence are they exercising?

Filtering influence

Explanation:

Filtering influence- it is referred to that influence when one influence need to be hide or filter. Just in case of media, when one media agency want to hide the report or story they used filtering influence.

In graphic pane interface, some information are hide or filter just to make graphic pane simple. By filtering influence, link under the influence is still exist but information about the influence is hidden.

Agenda setting

Explanation: Agenda setting can be simply defined as the way through which the media tries to influence the public on what they think about. It is the idea that what ever the public thinks about (topics) or give more importance to is set or propagated by the media. Agenda setting are of three types, namely; Media agenda setting, public agenda setting and policy agenda setting.

c. taught scientists many new things about the earth, but not other planets.

explanation:

answer; the above statement is (true);