Explanation:

- Option 1: Pathologist

- A pathologist is a doctor who studies and diagnoses disease through the examination of organs, tissues, bodily fluids, and autopsies. They are not specifically focused on the heart.

- Option 2: Cardiologist

- A cardiologist is a specialist doctor who diagnoses and treats heart disorders. They focus on preventing, understanding, and managing cardiovascular conditions.

- This is the correct answer.

- Option 3: Neurologist

- A neurologist specializes in diagnosing and treating disorders of the nervous system, not the heart. Their focus is on the brain, spinal cord, and nerves.

- Option 4: Pediatrician

- A pediatrician is a physician specializing in the medical care of infants, children, and adolescents. They handle general health issues for young patients, not specifically related to heart diseases.