Ron has an endomorphy type of physique.
Option c
When it comes to the outer appearance of an individual, Endomorphs are those who have shorter height in general, round body structure with wider hips and shoulder. Endomorphs generally face a lot of trouble losing weight. They also have difficulties maintaining their good fat percentage i.e. healthy body fat. They have a low need for sleep and eventually low energy levels.
For example: A person who gains 5 pounds just by eating a piece of donut can be called as an Endomorph.