Assuming the options are:
They can ease pain in patients.
They can reduce tumors in patients.
-> They show which parts of the brain are involved in specific activities.
They distinguish between the possible causes of a symptom.
Magnetic resonance imaging is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body in both health and disease. MRI scanners use strong magnetic fields, magnetic field gradients, and radio waves to generate images of the organs in the body.