which sentence includes a participial phrase?

1. Would you help our planning the trip?

2. I would like to go to the new mountain resort.

3.I looked in the closet for my sweater.

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

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

The sentence that includes a participial phrase is:

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

The sentence that includes a participial phrase is:

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

To identify a participial phrase, you need to look for a verb form that ends in "-ing" or "-ed" used as an adjective. In this case, the verb form "staring" is used to describe Jack, and it functions as an adjective modifying the subject. Therefore, "staring down the mountain" is a participial phrase in the sentence.