Define Absolute phrase
Absolute phrases are optional in sentences, i.e., they can be removed without damaging the grammatical integrity of the sentence.
Since absolute phrases are optional in the sentence, they are often set off from the sentence with commas or, less often, with dashes.
An absolute phrase cannot contain a FINITE VERB.(a verb which has a subject and shows tense. In short, it is a verb being a verb (i.e., a doing word))