Answer:
The correct answer is "structure".
Step-by-step explanation:
The pattern or form of a poem refers to the length, placement, and grouping of lines and stanzas, which as whole evoke a certain response by the reader. This pattern or form is called the structure of the poem, which comprises other elements of poetry such as the rhythm. The rhythm is an element of the structure defined as the beat of the poem measured in meters of stressed and unstressed syllables.