Critical Thinking (1 long-answer question) 28. Long Answer. Use complete sentences to answer the following questions: After reading the three passages about space exploration and its many pros and cons, do you think it is better to focus on studying space and the unknown or fixing the problems on our planet? What makes Earth the perfect environment for us compared to the other planets in our solar system? Why are people trying to figure out how to create a colony on Mars? Do you think people will actually live on Mars someday? Do you think people should live on Mars?