Answer:
i think its the first one but im not sure
Answer:An understatement usually has an ironic effect, as an equally intense response is expected in severe situations, but the statement in response is the opposite of what was expected. For instance, your friend returns your new coat with a large wine stain on the front of it.
Explanation:
Speech balloons, also known as speech bubbles, dialogue balloons or word balloons, are a graphic convention used most commonly in comic books, comics and cartoons to allow words to be understood as representing the speech or thoughts of a given character in the story or events of the graphic novel or Comic.
According to the information presented before I would conclude that the main purpose of a speech bubble in a graphic novel is:
D) It illustrates internal thoughts.
Do some research to support what you will say, don't plagiarize. Have contect to support your case.