Viviparity is considered to be more evolved because:
a. the young ones are left on their
b. the young ones are protected by a thick shell
c. the young ones are protected inside the mother's body and are looked after they are born leading to more chances of survival
d. the embryo takes a long time to develop
The answer is the option (c) the young ones are protected inside the mother's body and are looked after they are born leading to more chances of survival
Explanation: the young ones are protected inside the mother's body and are looked after they are born leading to more chances of survival