Reading words in appropriate sets rather than one-by-one is called: Phrasing
So, what is the question being asked here? Is it for us to actually write a letter. Or is it for us to answer?
The tropics, underwater volcanic regions, the equator.
Answer:
The answer is symbolism, because getting arrested in the name of art symbolizes giving up yourself, your freedom, to art, something that is beautiful and vibrant and holds a message.