* Nourishment: Most mammals give birth to live young, and mothers provide milk through mammary glands to nourish their offspring. Reptiles, on the other hand, lay eggs and their young are independent from birth.
* Warmth: Mammals are warm-blooded and maintain a constant internal temperature. Young mammals often need their parents to keep them warm, especially in cold environments. Reptiles are cold-blooded and rely on external sources of heat.
* Protection: Young mammals are vulnerable to predators and need their parents to protect them until they are old enough to fend for themselves. Reptile young are also vulnerable, but they typically rely on instinct and camouflage for survival.
In short, the parental care provided by mammals is much more extensive and crucial for the survival of their young compared to reptiles.