Final answer:
Facial palsy during birth is most likely caused by the pressure on the facial nerve from forceps delivery. Distinct from cerebral palsy, it specifically involves paralysis of facial muscles due to nerve damage.
Step-by-step explanation:
Facial palsy, or paralysis, which occurs due to pressure on the facial nerve, can be caused by several factors during birth. In the list provided, the most relevant to facial palsy as a result of birth pressure is c) Forceps delivery. Forceps are a surgical instrument that resemble tongs and are used to assist in the delivery of a baby. Their use can lead to pressure on the infant's facial nerve, causing paralysis or palsy. It should be noted that facial palsy is different from cerebral palsy, which is a disorder affecting muscle tone, movement, and motor skills. Craniosynostosis and conditions like cleft palate are also separate developmental defects. Moreover, while a brachial plexus injury could affect the arms, and umbilical cord compression could lead to a range of issues, neither is typically associated with facial paralysis.