Why are offspring of oviparous animals at a greater risk as compared to offspring of viviparous animals?

Oviparous animals are egg-laying animals that bear young in the egg stage of development and young ones are developed outside the female body thereby not getting prenatal protection and nourishment. It poses a greater risk of predation and lower survival rate. Viviparous animals bear living young that develop within the body of the mother thereby getting proper prenatal care and protection leading to greater survival rate.