Which of the following vertebrates incubate their eggs?

Birds incubate their eggs. Birds have a special pouch called the brood pouch, which is located on their underbelly. The brood pouch is where the eggs are incubated until they hatch. The parent bird sits on the eggs to provide warmth and ensure that the eggs develop properly. During this process, the parent bird may leave the eggs briefly to feed or drink, but returns to continue the incubation process. Once the eggs hatch, the parent bird continues to provide care for the hatchlings until they are able to fend for themselves.