Final answer:
The line provided does not fit the structure of a b. Haiku, Epic Poem, or Free Verse and may align more with the style of a Shakespearean sonnet, but more context is required to precisely identify the form.
Step-by-step explanation:
The line “Their eyes purging thick amber and plum tree gum” does not conform to the structure of a b. Haiku, which is a three-line poem with a 5-7-5 syllable pattern, often reflecting on nature or seasons.
Neither is it an Epic Poem, which is a lengthy narrative poem that often deals with heroic deeds and events significant to a culture or nation. It is also not Free Verse, which does not follow the rules of traditional poetry in terms of patterns of rhyme, meter, or syllable count.
The phrase most aligns with the style of a Shakespearean sonnet, which is structured into three quatrains followed by a couplet in iambic pentameter with the rhyme scheme A B A B, C D C D, E F E F, G G. However, without more context or information on the structure of the poem from which this line is derived, including meter and rhyme scheme, it's challenging to accurately identify the form based solely on this single line.