Aspeaker can invoke concepts or ideas that the audience is already familiar with by including in a speech.

A speaker can invoke concepts or ideas that the audience is already familiar with by including common themes in a speech.

Explanation:

When a person is going to give a speech in front of a big audience, it is necessary to add some points of neutral or common information to which if not everyone, as many as possible can relate so the concepts can be easily invoked because they understand and the speaker can convey the message and achieve the objective.

mrs. wright was trapped in her marriage, and could not escape it

throughout history, economists have always thought  ..