Tyrone is giving a presentation about how robins build nests. He has prepared a poster and brought in an abandoned robin's nest to use as visual aids. Which gesture would be most appropriate for Tyrone's presentation?
a. Pointing to the pictures on his poster as he describes how robins make nests
b. Gesturing wildly at the robin's nest as he explains where he found it
c. Walking around the room quickly to show his audience the nest
d. Waving the poster around above his head to get the attention of his audience
