What differs in people living in different parts the world?
Options:
- countries
- space
- universe
- thought
- obesity
Let's think carefully first. Step-by-step reasoning process:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Every persons thoughts are different. People living in different parts the world are having different types of thought. So the final answer is thought.