Which kind of phrase are the underlined words in the sentence?

dad moved the tent into our backyard.

a.
appositive phrase

b.
adverb phrase

c. adjective phrase

In linguistics, an adverbial phrase is a group of two or more words operating adverbially, meaning that their syntactic function is to modify a verb, an adjective, or an adverb. Adverbial phrases are phrases that do the work of an adverb in a sentence. I would say your answer is B: Adverb Phrase. I looked up the definition to sort of help understand it better

Not sure bahensbsbsbbsns