Answer: B
Explanation: would be my best guess because For up to three months, the mother waits nearby, protecting her eggs from predators or any other danger. As soon as the baby crocodiles are ready to hatch, they start to chirp. ... Instinct prevents the mother crocodile from closing her jaws, so the young are safe from her large, sharp teeth
Reptiles have a three chambered heart, two atria and one partially divided ventricle. This results in some mixing of oxygenated and deoxygenated blood. However, crocodilians have a four chambered heart with fully divided ventricles like mammals and birds.
