The correct answer is D. An unstressed syllable followed by a stressed syllable
Explanation:
The word "iamb" is used in poetry to define a poetic meter unit or metrical foot compose of an unstressed or short syllable followed by a stressed or long syllable that creates a particular rhythm and cadence in verses. Additionally, the iamb is one of the poetic meter units most widely used in the English poetry and includes different meter or verse structures such as the dimeter or verse with two iambs, the pentameter or verse with five iambs or the heptamer or verse with seven iambs. Therefore, an iamb is the combination of an unstressed syllable followed by a stressed syllable.
