Gregory Stock is considered to be an expert in biotechnology. He has spent much of his career working to develop therapies for various conditions. He would be most qualified to write about new technologies in medicine.
So when the prompt asks for 3 examples of powerful language, it's asking for something that makes an impact. It's powerful, and it make you think. Kind of like figurative language or metaphors. That's just what I think though...
the answer is the 3rd option because the bullet is moving in a straight line
