What is the ruling on orthodontic treatment in the case of protruding upper and lower front teeth, along with the need to extract four molars, and is it permissible to refuse treatment?

It is permissible to straighten teeth if there is a defect or a deformity. If the girl does not wish to do so, she may leave them as they are, and she can convince her parents through dialogue and seeking intercession. However, it is more befitting for her to obey her parents and seek their pleasure if they are not convinced.