The poetic foot and the length of line make up the of the poem.

rhyme
imagery
meter

The correct answer is C. Meter

Explanation:

In poetry the structure of verses or the way verses are constructed is determined by length of lines which is linked to the numbers of syllables in each verse and the way these syllables are combined in stressed and unstressed combinations (poetic foot). This structure and the possible combinations that emerged from the use of different poetic feet and the length of lines or verses is called the meter. Additionally, the meter provides poetry with a rhythmic structure as different combinations create different types of flow or cadence in verses and in some cases it also provides rhyme patterns (repetition of sounds). Thus, the poetic foot (the combination of stressed and unstressed syllables) and the length of lines (number of syllables per verse) make up the meter of the poem.

there purpose is to entertain

ah, shun the horrid gulf! by scylla fly.