To determine the correct context in which corrective exercises should be undertaken, we need to understand the roles involved in guiding such exercises.
Given this analysis, the correct answer is "Physician's or Physiotherapist's." These professionals are equipped to provide the necessary medical advice and supervision required for corrective exercises, ensuring that the exercises are safe and beneficial for the individual's health.
A useful way to approach this is to think about what could go wrong if corrective exercises were supervised by the wrong person, since postural deformities involve real structural or muscular issues that respond badly to an incorrect exercise program.
Because incorrect supervision of corrective exercise can worsen a deformity rather than fix it, the safe and appropriate choice is supervision by professionals trained in diagnosis and rehabilitation.
Therefore, the correct answer is Physician's or Physiotherapist's.