When communication occurs, it typically happens in one of three ways: verbal, nonverbal and visual. People very often take communication for granted. Communicators constantly exchange information, meaning people always seem to be either receiving or giving information.
It's certainly sensory. And it's figurative too. I think I'd pick figurative because the central piece of language is a simile. That's pretty good use of language when you compare the bobbing heads of flowers to helmeted soldiers.
The answer is A. Delicate lines straighten inner forms