What part of speech is jumping?

"Jumping" can be a few different parts of speech, depending on how it's used in a sentence:

* Verb (present participle): "The dog is jumping over the fence."

* Gerund (noun): "Jumping is a good exercise."

* Adjective: "The jumping bean moved across the table."

Let me know the full sentence, and I can tell you for sure which part of speech "jumping" is!