Answer:
Option D, rehabilitative, is the right answer.
Step-by-step explanation:
An educational field, which studies the impact of injury and the effectiveness of rehabilitation therapeutics and mediation on the performance of the patient, is known as Rehabilitation bio-mechanics. In this study, a student gets knowledge about how exercising machines can help a person to heal from injuries. They employ the principles of physics and engineering to evaluate and examine the movement and manipulation of the body.
Since, such exercise machines helps an individual to heal from various injuries and in the given case, from a back injury, the exercise machines play a role of "rehabilitative biomechanics".