Answer:
1. Open form - These poems have a relatively loose structure when it comes to length, meter, rhyme, or syntax.
2. Blank verse - These poems are written in iambic pentameter, a meter commonly used in poetry and verse drama.
3. Free verse - These poems do not follow any rules. Authors use various elements to communicate their intended meaning.
4. Closed form - These poems follow specific patterns in terms of rhyme, meter, and length.
Explanation:
A poem that presents an open form does not observe the rules strictly. It may present some metric, it may establish some rhythm, but nothing to the point of having a fixed pattern throughout the whole work.
Free verse is a type of poem that does not follow any rules for meter or rhyme schemes at all. NOTE: You will find books and sites that use "free verse" and "open form" as synonyms.
Blank verse happens when the lines do not rhyme, but they do present a regular metric pattern - usually, iambic pentameter.
Finally, a poem that has closed form presents a fixed, rigid pattern for rhythm, rhyme, and metrics from beginning to ending.
Explanation: