Answer: I believe it’s A.
Explanation: it explains difficulties that astronauts may face and in the following sentence it goes more in depth
Unlike most animals, they're enjoyable. They don't do anything but sing til they die. They're calm, peaceful, and beautiful. Mockingbirds are nothing but amazing. It's a sin to kill a mockingbird just like it's a sin to kill a unicorn. To kill something so pure and harmless is horrible. That's why it's a sin to kill a mocking bird.
i hope this helps :^)
It is an external conflict.
Conflicts are the situations that advance the plot of a story. Fundamental to entertain the reader, because through them the characters express themselves. The external conflict is one that occurs between two or more characters or a character and their environment.
In the fragment, the conflict is between the main character and his environment, which is very cold and uncomfortable. The character should learn how to make the fire to face the adverse situation.