Viviparous animals are those that give birth to live young rather than laying eggs. This reproductive strategy allows the developing embryos to receive nutrients and oxygen directly from the mother through a structure called the placenta. Common examples of viviparous animals include most mammals, such as humans, dogs, and whales. In contrast to oviparous animals, which lay eggs, viviparous species provide a more protected environment for their offspring during development. This can lead to higher survival rates for the young, as they are nurtured inside the mother's body until they are ready to be born.