B. She silently comforts her friend by squeezing his hand.
I believe it's persuade. You want to persuade schools to offer better food. B is wrong because you are not entertaining anyone. Inform is wrong because you would just be stating facts. A is wrong because you are not telling someone to do something. Hope this helps! ;)
I'm pretty confident your answer is adjective. Hope this helped!
It's called a metaphor! :)
