Yor madar
You have an ectomorph body build.
An ectomorph is characterized to burn energy instead of storing it in body fat. Therefore, being an ectomorph and having a fatty stomach is somewhat uncommon. Getting rid of unwanted body fat is luckily pretty easy for an ectomorph (than it is for a meso- or an endomorph) as they easily burn calories. Try adjusting your diet, exercising and avoid eating refined foods and "empty carbs" such as sweets if you can. Eat fresh foods such as fruits and vegetables and if you can't bother with sports at least go jogging once in a while. Hope I could help.
ectomorph, mesomorph, and endomorph
ectomorph, mesomorph, and endomorph as far as I know.
young appearance
this refers to one of the 3 principle body types mesomorph, ectomorph, and endomorph endomorph describes a fat body type mesomorph--> muscular body type ectomorph--->thin/skinny body type
You aren't eating enough
Ectomorph is a tall and thin body type.
Ectomorph body type is often associated with a lean and youthful appearance due to its characteristic slim build and low body fat percentage.
Long Distance sports, or sports involving plyometrics.
There is no food that generally makes your wrists bigger. Having skinny wrists is part of being an ectomorph. If you want to fill out you have to do some weight training, along with good eating of course.