The animated communicator style ranges from absence of hostility to signals of deep intimacy

An economics professor creates a tree diagram in preparing his one-hour lecture to open the new semester. This means he needs help in

a. selecting the ideas that are most relevant to his audience. b. providing visual support for his presentation. c. dividing his topic into subparts until it seems manageable. d. combining all his points that have a common focus.

Which of these is not an example of illustration?

a. A picture b. A map c. A font size d. A logo