When answering this question, you can compare the types of food, cooking methods, and eating habits from today and the past. For example, nowadays people have access to a wider variety of foods, including international cuisines and processed foods, thanks to globalization and modern technology. In the past, people mostly ate local and seasonal foods, and meals were usually home-cooked. You can also mention that fast food and convenience foods are much more common today, while traditional recipes and eating together as a family were more common before. Giving specific examples will help make your answer clearer.