Final answer:
The survey flow that represents the funnel approach is option C: Warm up questions, demographic questions, easy questions, questions about topics 1, 2, and 3.
Step-by-step explanation:
The funnel approach is a survey design technique that involves gradually narrowing down the questions from general to specific. It is called the funnel approach because it resembles a funnel shape, starting with broad questions and gradually focusing on more specific topics.
Out of the given options, the survey flow that represents the funnel approach is option C: Warm up questions, demographic questions, easy questions, questions about topics 1, 2, and 3. This flow starts with warm-up questions to engage the respondents, followed by demographic questions to gather basic information. Then, it progresses to easy questions before moving on to more specific questions about topics 1, 2, and 3.
This approach helps maintain respondent interest and encourages participation throughout the survey by gradually increasing the level of specificity and complexity of the questions.