The Answer Would Be "All of the choices are correct"
It is important to have a job because that is the way to earn money, and we need money so we could survive. But, actually, that is not the only reason why a job is so important to us. It is also important that we do what we like, because that improves our life's quality. If we have a job that we consider as important and meaningful, and we do it good, it will help us to feel that we live a meaningful life. On the other hand, if we are work something we don't like, our life will be stressful and disgustful.
Answer: It tells readers there is something important happening on that asteroid.
The tone, or attitude, is the way the narrator is trying to get across to make you feel. They are trying to show how they are feeling without directly saying it.