A participial phrase is a group of words consisting of a participle (verb form ending in -ing, -ed, -en, -d, -t) and any modifiers, complements, or objects. It functions as an adjective in a sentence to modify a noun or pronoun.
In the provided options:
1. Running through the woods - This is a participial phrase because "running" is a present participle that describes the action and it is followed by the prepositional phrase "through the woods."
Therefore, the participial phrase from the options given is "Running through the woods."