Answer:
Pressure on the head from birth canal
Explanation:
According to scientific findings, the women birth canal is narrow and considered to have muscle, and because of this, during childbirth, the newborn baby while passing through the birth canal, tend to receive a lot of pressure, which can cause the head of the newborn baby to have a shape in accordance to the birth canal.
Hence, in the case, the right answer is "pressure on the head from birth canal" can be attributed to the cone shape of the newborn baby.
