Cultures differ because people live in different conditions, be they ecological, economic, social, or what have you. For example, each culture is ultimately a unique adaptation to the social and environmental conditions in which it evolves.According to the passage, it is reasonable to assume that

When you’re answering the Paragraph Comprehension questions, keep these tips in mind:   
- Skim the passage and read the question. Then go back to the passage to find the answer. 
- Select the correct answer based on the passage rather than your personal knowledge or opinion on the subject.  
- Answer choices that include the word all, none, always, never, or some other absolute are rarely correct, so think twice before you settle on one of these answers.