Answer: fragment
Step-by-step explanation:
A fragment is a group of words that does not form a complete sentence, because it is missing one or more of the necessary components of a sentence, such as a subject, a verb, or a complete idea. In this case, the phrase "never try to outrun a bear, it can run about 30 mph" does not contain a subject or a verb, and does not express a complete idea. To make this a complete sentence, it could be revised to say something like "You should never try to outrun a bear, because it can run about 30 mph" or "The bear can run about 30 mph, so never try to outrun it."