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

(N/A) Oviparous animals lay eggs outside their body. As a result,the eggs of these animals are under continuous threat from various environmental factors and predators.
In contrast,in viviparous animals,the development of the embryo takes place inside the female body,providing protection and nourishment.
Therefore,the offspring of oviparous animals are at a greater risk of survival compared to the offspring of viviparous animals,which are born after a period of protected development.