Answer: An audience-centered presentational speaker is someone who considers and adapts to the audience at every stage of the presentational speaking process.
Explanation: An audience-centered speaker puts the public at the center of his/her presentation. In other words, the speaker presents information always taking into account which are the audience's interests, concerns and needs. In that way, he/she provides knowledge that the audience considers to be relevant and interesting. An audience-centered presentation is put forward to benefit the audience and not the speaker. For that reason, the speaker generally also seeks to engage the public by asking questions and listening to them.