Answer and Explanation:
You should use multiple sources to show that your essay has a diversity of information, being a rich essay, where you researched different points of view and endeavored to create it according to several relevant works on the subject. In addition, multiple sources provide more support for you to create your arguments and your own original ideas, as it offers you a more complete range of information.
I believe ether he must survive for his freedom off the island or if your asking time wise then for 3 days without getting caught
I believe the answer would be 2.