A foil <span>provides contrast with the main character.</span>
Iambic pentameter follows an abababab rhythmic pattern.
Example:
"What light through yonder window breaks?"
See how the rhythm sounds when you read that sentence:
what light (ab) through yon - (ab) der win- (ab) dow breaks?
What do you think the poem, "Solitude" by Ella Wheeler Wilcox seems to be saying about the golden rule?