If I am caught, I will create the island, lighters, knives, clothing, medications. Canned food and drinking water, because there are 2 things we lack food and water?
If I stick to a deserted island, I would take a knife lighters, clothes, medicines, food and drinking water because there are two things we can not live without water and food.
If I were stranded on a deserted island. I'll take a knife, lighter clothing, medicine, food and drinking water. Because people have 2 indispensable things is water and food.