Man vs nature is the correct answer
1. People should buy less because it saves them money.
2. Japan has no swimable beaches because they are toxic.
3. Artificial beaches are safe due to them being man-made.
4. Earthquakes are more powerful than erosion when they are large.
5. Go for natural organic food when you want a healthy snack.
Is there a story to it? Because I don't understand it without the story.