quick answer:
B
Step-by-step explanation:
with a poem, you want to convey a certain message. the way you speak is a big part of that. when you speak, if your tone is flat or with no expression it can feel boring and dull. when you add emotion and tone to your voice it sounds expressive and gets the message and mood to your reader. when they emphasize words, it can mean different things and make more meaning or, well, emphasize them. it's very important for speakers to do this to either convey more emotion and a certain feeling for the poem, or convince them of something. since this is a poem, they are usually not trying to convince someone of something.
hope this helped :)