Is this even a question? I guess he is though.
Answer:
Letters tend to be more formal.
Explanation:
In letters, most of the time your writing a formal letter. To inform somebody(communicate), or to persuade somebody. But in poem, you can be free with your thoughts and opinions. For example, in poem's people talk about love, freedom, politics and anything
Answer: D
Explanation: The sentence expresses the emotion of being pleased honestly it could be a period or exclamation but period would be blunt
I would definitely go with option A.
Interpret what the author is telling you and use key words to find a main idea