If you have Google docs, go to add-ons and search easy-bib. You put in the site and it gives it back to you in MLA format. If you don't have Google docs, copy and paste this website into your search engine: http://olympus.sandhills.edu/english/wordguide/mlaformat.html
She is using looking for a solution to her problem.
Stab herself with a knife(Kill herself)
Answer: I'm not going to write your whole essay for you, but some good reasons to use would be: A change in atmosphere, they can experience what life is like on a different planet, they can get a chance to learn more about mars or anything else about space, and they can compare and contrast how different mars is from earth along with make new memories on a different planet.