Let's break it down:
* "To" is a preposition, indicating direction or relation.
* "Several" is an adjective, modifying a noun that is understood in the context of the sentence.
Here's an example:
* "The teacher gave the books to several students."
In this sentence, "to several students" modifies the verb "gave" by specifying who received the books. It answers the question "To whom?"
Therefore, "to several" functions as an adverbial phrase because it modifies a verb and provides additional information about the action.