Rough winds do shake the darling buds of May

How many iambs are found in this line from “Sonnet 18”?

Five, because an iamb is a stressed syllable that is emphasized.
Five, because an iamb is an unstressed syllable and a stressed syllable.
Nine, because an iamb is the number of words found within a line of poetry.
Ten, because an iamb is a count of the individual syllables in a poetic line.

Five, because an iamb is an unstressed syllable and a stressed syllable.

Five, because an iamb is an unstressed syllable followed by a stressed syllable. The line "Rough winds do shake the darling buds of May" contains five iambs: "Rough winds," "do shake," "the dar-," "ling buds," and "of May."

To determine the number of iambs in a line of poetry, we need to understand what an iamb is. An iamb is a metrical foot consisting of two syllables, with the first syllable being unstressed and the second syllable being stressed. In the line "Rough winds do shake the darling buds of May" from "Sonnet 18," we can analyze it:

1. Rough winds (unstressed, stressed)
2. do shake (unstressed, stressed)
3. the darling (unstressed, stressed)
4. buds of (unstressed, stressed)
5. May (unstressed, stressed)

So, each pair of unstressed and stressed syllables in the line represents one iamb. Counting the pairs, we find that there are five iambs in the line.

Therefore, the correct answer is:
Five, because an iamb is an unstressed syllable and a stressed syllable.