You answered: Correct Answer: Eating high-fat foods is not helpful, but excess calories of any kind can increase your waistline and contribute to belly fat. Still, there is no single cause of belly fat. Genetics, diet, age, and lifestyle can all play a role. Changing dietary habits can help you fight the battle of the bulge and fight belly fat: Read labels, reduce saturated fats, increase the amount of fruits and veggies you eat, and control and reduce your portions. Next.