Answer:
Character/man vs. nature.
Step-by-step explanation:
In a story, conflict is the confrontational, opposing forces that occur to the characters. This conflict may result as a form of different opinions or even may pit one against another or anything that obstructs a character from getting to a certain designated destination.
According to the question, the character in the story is fighting for his life while lost at sea. In this case, the conflict is between the man/ character and his need to survive, which is made difficult by his condition of being lost at sea. So, he has to overcome his hurdles at sea and fight nature if he is to survive. Thus, we can deduce that the conflict is between the character/ man and sea/ nature.