The pictures that you have sent. If you are biting in the proper position, shows that there is a discrepancy in growth between your upper and lower jaw. Since you are 15, it is not possible to modulate your skeletal growth. That would have been possible in case you visited a dentist when you were 8-9 yrs of age. At this age such problem can be corrected with help of either braces or with surgery. A proper physical examination by an orthodontist along with x-rays and model analysis is required to see what will work for you- braces or surgery. Visit an orthodontist.

Yes definitely it can be treated orthodontically using braces but again it depends upon the severity of open bite, other occlusal problems, skeletal growth patterns which will dictate the nature of treatment needed which is either conservative orthodontic treatment or surgical treatment.

Yes, definitely it can be fixed using braces. but it depends on case to case. it depends on amount of severity, amount of growth left and many factors. so, the treatment suitable for you can only be told after examining clinically and radio-graphically. And the cost of treatment is varying, as there are different modalities available. that depends on you what you choose.