• If a cat could talk, I would ask what you are thinking about. = If a cat could talk, I would ask what it is thinking about.
  “you” → “it” because we are talking about the cat, not the person.
• I'm always curious about the thinking they have. = I'm always curious about what they are thinking.
  “the thinking they have” → “what they are thinking” is natural English.
• In Korea, there are some habits that cats choose their owners as butler. = In Korea, there is a habit of cats choosing their owners as servants.
  “some habits that cats choose their owners as butler” → simplified and corrected for grammar; “butler” → “servant” is more natural here.
• I really want to know about her thinking about this custom. = I really want to know what she thinks about this custom.
  “her thinking about this custom” → “what she thinks about this custom” is simpler and natural.

ESSAY:

I think tourism is like a double-edged sword. On one hand, it boosts the local economy, as many tourists spend money on food, souvenirs, and other activities. This spending helps make the local community wealthier. On the other hand, tourism can harm the community by damaging nature and causing disputes. For example, in Japan, many locals complain about tourists taking photos on the streets and want restrictions to be put in place.

Great topic! Your answer is good because you explained both the positive and negative effects of tourism and gave a real example from Japan. To improve, try adding a short conclusion that clearly states your overall opinion. Also, when speaking, give one or two more simple examples to make your answer more complete and convincing. Well done!