Novice speakers tend to use visuals as a (a)   in their speeches. That's why some people suggest they don't use them at first.

Visual aids can be an important part of (a)   your message effectively since people learn far more by hearing and seeing at the same time.

In Japan and other countries, people usually (a)   when introduced to one another.

Visual aids should be used to (a)   your message so that people better understand and remember it.

Visual aids should illustrate important points that are (a)   hard to understand.

A speaker could use a photo of a starving child to create a (a)   reaction in the audience.

Visual metaphors are useful when trying to (a)   an emotion.