Final answer:
In iambic pentameter, nouns are often stressed to create emphasis and reinforce meaning within the poetic line.
Step-by-step explanation:
In iambic pentameter, the part of speech that is often stressed is nouns. Iambic pentameter is a poetic meter commonly used in English poetry, and it consists of lines containing five iambs, which are metrical feet consisting of an unstressed syllable followed by a stressed syllable.
For example, in the line 'Shall I compare thee to a summer's day?' from Shakespeare's Sonnet 18, the noun 'day' is stressed: 'Shall I compare thee to a summer's day?'
Stressing nouns in iambic pentameter helps to create emphasis and reinforce the meaning of the words within the poetic line.
Learn more about iambic pentameter