The adverb phrase in the sentence is "in place of".
An adverb phrase is a group of words (more than one) that act as an adverb. An adverb or adverb phrase can modify a verb, an adverb, or an adjective and provides information about the mode(how), the place( where), the reason (where) or the time (when), of the action, for example.
In place of junk food, our cafeteria now has a salad bar. Adverb phrase: In place of junk food.
An adverb phrase is made up of one or more words. The adverb is the head of the phrase and may appear alone or it can be modified by other words. Adverbs constitute one of the four major word classes, together with nouns, verbs and adjectives.
Adverb phrases typically answer the questions how, where, why or when something was done.
