Why is John sad?

In this section, you will hear a monologue. The monologue will be read twice. After the monologue, there will be a one-minute pause. During the pause, read the questions and the four choices marked A, B, C and D, and decide which is the best answer. Then mark the corresponding letter on the answer sheet with a single line through the centre.
     (M)"When I was a little boy, I loved to go fishing in the sea," says John Sailike, sadly. " When I leave the island, I’ll lose the sea and the happiness of this place. I’ll miss the sound of the waves at night... I won’t hear it anymore. "
    John is a fisherman from Carteret Island in the South Pacific. Each day, he goes out in a canoe to catch fish for his family, while his wife looks after the children and grows vegetables in their garden. The family lives in a wood hut with sand floors and they don’t use electricity, so when the sun goes down it is usually time for bed. This peaceful, underdeveloped place has a tiny population and only one contact with the outside world—a ship which brings supplies from Bougainville, a large island 6 km away. But all this is about to change, because John, along with other people, is leaving his island home.
    Carteret Island is the victim of global warming. Salty water from the sea is polluting the fresh water supply. High tides often flood across the villages and wash away people’s homes. Islanders are struggling to survive on coconut milk and fish, and children are suffering from malnutrition. The dying trees are home to mosquitoes that spread diseases. People know that life on the island is coming to an end.
    Experts predict that Carteret Island will be under water in the near future. Before then, the islanders will relocate to places like Bougainville and rebuild their lives. This move will provide people with food and shelter, but what will happen to their culture? The islanders have songs for different everyday activities, and traditions and celebrations linked to the sea. They also have their own language. If they co-exist with other cultures, this may die out.