The evolution of the watertight amniotic egg with its series of membranes allowed reptiles to replace and become the dominant terrestrial vertebrate.

Amphibians

Explanation: Reptiles are a group of vertebrates with scaly bodies. They occupy an intermediate position in the evolution between Amphibians and warm blooded vertebrates.Reptiles arise from Amphibians and they possess dry scaly skins.examples of reptiles include snakes,lizards,turtles etc.

The sexes in reptiles are separate.they reproduce by internal fertilization and the eggs are enclosed within protective shells. The eggs of reptiles contains embryonic membranes,yolk sac,amnion,, chorion etc,so that the embryonic in the egg develops before being hatched

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .