Why do two 16 year old males of the same weight might need different amounts of energy?

Two 16-year-old males of the same weight may require different amounts of energy due to variations in their metabolic rates, physical activity levels, and overall health. For instance, one might be more physically active, participating in sports or exercise, which increases energy needs. Additionally, factors like muscle mass, genetics, and hormonal differences can influence metabolism, leading to different energy requirements. Lastly, individual growth rates and nutritional needs can also contribute to these differences.