The stressed syllables forming an iambic pentameter in the line from "Romeo and Juliet" are "house, both, like- dig-, -ty." (options C)
An iamb is a sequence consisting of an unstressed syllable followed by a stressed one. An iambic pentameter is formed by repeating that sequence 5 times.
Let's highlight the stressed syllables in the line from "Romeo and Juliet" too better illustrate the use of iambic pentameter by Shakespeare: "Two households both alike in dignity."
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