I'm sure its the first one. I haven't really read the poem in a while but i can easily tell by how it's spoken.
A is the answer to your question
Answer:
they stress how positively Miss Brill views everyone at the park
Well some people migrate because better economy or war, but there's a lot of reasons why someone would migrate
Answer:
it helps maintain a level of carbon in the atmosphere that is neither too hot nor too cold.
Explanation:
In the article, it states that having too much in the atmosphere will result in the atmosphere being too cold. So, if we had just the right amount, we would be fine.