Answer:
C. Free verse
Step-by-step explanation:
In literature theory, poems structured in Free verses are those that do not follow a defined metric pattern. That is, they do not obey the fixed forms, so they are in opposition to the regular or isometric verses, which have the same measure.
It is important to note that the poetic texts that present the free verses do not fail to bring together the main characteristic of poetry: musicality.
Free verses are an important feature of modern and contemporary literature, since the greatest intention of these writers was to create something new and innovative, thus breaking with the classical standards of metrification by subverting traditional poetic forms.