Why does Karana decide to build a hut on the headland In island of the blue dolphins?

Karana decides to build a hut on the headland in "Island of the Blue Dolphins" for protection and safety after the Aleuts leave the island. She seeks a secure place to live away from the dangers posed by both the sea and potential threats from other humans. The headland offers a vantage point where she can observe her surroundings, providing a sense of security and solitude as she adapts to her life alone on the island. This decision reflects her resourcefulness and determination to survive in isolation.