Question: In light of the various approaches to weight maintenance and loss, consider the balance between proper nutrition and regular exercise. How do dietary changes and physical activity individually and collectively contribute to weight loss and maintenance? Discuss the role of calorie deficit through diet versus exercise, and explore whether one is more effective than the other or if a combination of both is necessary for sustainable weight management. Additionally, consider how individual differences, such as metabolism and lifestyle, can affect the effectiveness of nutrition and exercise plans.