Chaucer and the canter tales what technique use to create lively characters

The statement "visual aids summarize main ideas and key points" is true.

Visual aids can be defined as those things that you can look at includin a film, model, map, or slides, to help you understand something or to remember information.

For instance visual aids may be utilized in order to try to combat or prevent a disease by summarizing the key points and factor to take into account about it.