Respuesta :
The adjectival phrase in the given sentences has been the description of the noun breath with the adjectives one and deep. Thus, option A is correct.
What is an adjectival phrase?
The adjectival phrase can be given as the cumulative working of the group of adjectives for the noun or verb description.
The adjective in the given phrase has been the one, and deep. The words are cumulatively describing the noun breath. Thus, the phrase one deep breath is a adjectival phrase. Hence, option A is correct.
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