According to your textbook, is the audience's perception of whether a speaker has the best interests of the audience in mind.

The answer to this question is "GOODWILL" which means cooperative attitude or friendliness. As per and according to your textbook, GOODWILL is the audience's perception of whether a speaker has the best interests of the audience in mind. This will be an indication if the speaker is approachable friendly and positive towards people or the audience.