The constraints of the narrow, bipedal pelvis on the width of the birth canal may be an evolutionary incentive for __________.
A) increased pair bonding
B) the birth of more fully developed infants
C) shorter gestation periods
D) socially assisted birthing

Question

Quizplus · Accepted Answer

The narrow bipedal pelvis limits the width of the birth canal, making childbirth more difficult, which may have led to the evolution of socially assisted birthing practices to help ensure the survival of both mother and infant.

The Constraints of the Narrow, Bipedal Pelvis on the Width