Which sentence includes a participial phrase? Staring down the mountain, Jack was excited for a day of skiing. Would you help our planning the trip? I looked in the closet for my sweater. I would like to go to the new mountain resort.

Staring down the mountain, Jack was excited for a day of skiing.

The sentence that includes a participial phrase is: "Staring down the mountain, Jack was excited for a day of skiing."

The sentence "Staring down the mountain, Jack was excited for a day of skiing" includes a participial phrase.

A participial phrase begins with a participial (a verb form that ends in -ing or -ed) and functions as an adjective, providing additional information about a noun or pronoun in the sentence. In this case, the participial phrase is "Staring down the mountain," describing Jack's action or state.

To identify a participial phrase, you can look for verb forms ending in -ing or -ed that modify or describe a noun or pronoun in the sentence. In the given options, only the first sentence contains a participial phrase.