Final answer:
Surveys are not always effective for reflecting reality because people may not give accurate responses and surveys capture what people think and believe, not necessarily how they behave.
Step-by-step explanation:
The reason surveys are not always effective for reflecting reality is because people may not always give accurate responses. They might lie, misremember, or answer in a way that they think makes them look good. For example, people may report drinking less alcohol than they actually do. Additionally, surveys capture what people think and believe, but not necessarily how they behave in real life. This means that the responses may not always align with their actual behavior.