Here's why:
* Prepositional Phrase: It consists of a preposition ("in") followed by its object ("search").
* Adverbial Phrase: It modifies the verb in the sentence, indicating where, when, or how the action is taking place.
For example:
* "He is in search of adventure." Here, "in search of adventure" tells us *where* he is (metaphorically).
Let me know if you have any other questions!