Final answer:
Plays express theme through dialogue and plot, while poems use symbolic details and fresh language.
Step-by-step explanation:
Plays express theme differently than poems do by relying on dialogue and plot to communicate theme, while poems use symbolic details and fresh language. In plays, the characters speak to one another, and their words and actions convey the theme. On the other hand, poems use poetic devices such as symbolism and vivid language to convey the theme.