I’m presuming the last one is supposed to be bias, but that’s the one that has a negative connotation to it.
Explanation:
Without question, you should avoid sentence fragments in formal situations and academic writing. That said, a fragment within a clear context can sometimes serve a valid dramatic purpose. Journalists, bloggers, and fiction writers often use them.
Number 3 is tell I'll answer the others in a separate answer
Answer: Mistakes often result in powerful lessons.
