The correct answer is A. His use of meter
Explanation:
Robert Frost was an American poet mainly known by the use of rural life and rural settings to explore social themes from life in New England, the U.S. by the beginning of the 20th century, also, Frost use of colloquial speech and colloquial features in writing are especially recognized, as this aspect was different from the traditional style in poetry. However, regarding meter which is the way poems are constructed by following a specific structures of certain number of syllables in each verse and a combination of stressed and unstressed syllables, Frost was mainly traditional, because of this most of Frost poems have a iambic metric (combination of one stressed syllable and one unstressed syllable) using three, four or five of this combinations in each verse as Frost believe this gave a natural rhythm to his poems and because of this he always followed a strict pattern which was also a traditional view of metric in poems. Thus, the aspect that is traditional in Robert Frost's poetry is his use of meter.
