The phrase in the given sentence is option A. A gazelle.
What is a phrase? A phrase consists of words, but cannot stand alone because it does not give a complete idea, unlike a clause. Phrases do not possess a subject and a verb. For example: In the garden, my notebook, her sisters.
Carl Sandburg's "Grass" is a three-stanza ballad in free verse with straightforward words communicating a significant message. Free verse disregards standard tenets of meter for the rhythms of customary discussion. Basically, free verse frees verse from adjustment to inflexible metrical tenets that manage push designs and the quantity of syllables per line.