Final answer:
The sea is a central theme in the provided text excerpts, presenting challenges and contemplation for the characters, who navigate its dangers and indifference. so, option a is the correct answer.
Step-by-step explanation:
The excerpts presented from the stories indicate a common theme of the sea and individuals' interaction with it. The sea is often depicted as a force that is both formidable and indifferent to the struggles of those within it. In one instance, the characters experience a sense of brotherhood forged by their shared adversities at sea. In another, the indifference of the universe is pondered upon when faced with life-threatening circumstances. The sea is a backdrop to the narratives, influencing the characters' actions, emotions, and reflections on life.
The speaker tells the Fisherman about the city, but the Fisherman longs for the open sea. He admires the tranquility of the sea and prefers it over the city life. This can be seen in the excerpts provided, where the Fisherman expresses his desire to be out on the sea and his enjoyment of tales of adventure.