Suggested Research Method/Why

To summarize my research about Obesity and apply it to our lives now, I decided that I will ask people questions about their life through a survey. In my survey, I will ask questions like "How often do you exercise?" "Do you eat fast food often?" and "What is your favorite fast food restaurant?". Through this survey, it can give me a summary of people now who stay healthy and fit or just sit around on the couch.