Well I'm guessing the answer would be B
Skills and Heredity
I believe skills and heredity is the best choice because you should have a family lineages of healthy people and have the skillset to do the physically fit task, though my secondary choice is Fitness and skills, you can't be obese and be able to run 100miles, these are just my thoughts.
Answer:
It is true because saturated fats plus high-calorie foods can really make one pack on weight.
