Answer:
This is a sentence fragment.
Explanation:
A complete sentence would have a subject (the noun/actor in the sentence) and a predicate (the verb/action in the sentence).
A run-on sentence is multiple sentences fused together that are not punctuated correctly.
A fragment is an incomplete sentence that either contains only the subject (the noun/actor in the sentence) or the predicate (the verb/action in the sentence), but never both.
