Final answer:
Doulas are the professionals who assist in childbirth.
Step-by-step explanation:
The correct answer is b. Doulas. Doulas are trained professionals who provide continuous physical, emotional, and informational support to the birthing person and their partner during childbirth. They assist in ensuring a positive birthing experience by offering comfort measures, advocacy, and guidance.
In contrast, obstetricians are medical doctors who specialize in pregnancy, childbirth, and postpartum care. Pediatricians are doctors who specialize in the medical care of infants, children, and adolescents. Gynecologists are physicians who focus on the health of the female reproductive system.