Here's why:
* Participle: A participle is a verb form that acts as an adjective. It usually ends in "-ing" (present participle) or "-ed" (past participle).
* In the sentence: "Climbing" modifies the noun "vine" by describing its action. It's not a verb in this case because it doesn't describe an action happening in the present. Instead, it acts as an adjective describing the type of vine.
Let me know if you'd like to explore more about participles!