What are some things katana has done and decided to do that will help her survive alone on the island?

Realizing she will need a more permanent house, she starts scouting caves, but finally finds a perfect spot near the spring. Karana then develops a plan to build a fence that will protect her home and her stored food from foxes and wild dogs. Karana builds a fence using the skeleton of a whale that had beached on the island many years before. She ties its rib bones together with bull kelp, and uses wood and plants to construct a house within the fence. The only entrance to the house is a path she digs under the fence, and which she protects with stones. She even creates reed baskets and stone utensils to make cooking easier.