Question

How do you think the shift from cold blooded conditions to warm blooded conditions and the shift from oviparity to viviparity has helped vertebrates??????

Answer 1

1 - due to warm blood condition they can easily survive or adapt themselves in cold and hot condition
2- viviparity help them to escape from predators .eggs can be eaten by many birds and other animals without giving birth to a young ones .
Moreover​ in viviparity development of young ones takes place inside the body of a mother . so young ones remain safe.