Hint: The development of the embryo inside the body of its parent is termed as viviparity. Whereas, oviparity is the mode in which females lay eggs which complete their development and hatch externally from the mother’s body. All animals who give birth to their young ones are termed as viviparous animals. All other animals who lay eggs are termed as oviparous animals.
Complete answer: Those animals who give birth to offspring are known as viviparous. Both the process of fertilization, as well as the development of the embryo, takes place inside the female reproductive system in a viviparous animal. The mother delivers its offspring once the development of the fetus is completed. This condition is termed as matrotrophy in which the embryo obtains the needed nutrients directly from mother and not from the yolk. So, viviparity is found in all births giving animals. This includes humans. Examples of viviparous animals are: human beings, dogs, cats, elephants and some groups of sharks. Chances of survival are high for viviparous animals as nourishment and care is provided inside the womb of the mother.
So Viviparity is found in all the animals who give birth to offspring. Example: human beings, dogs, cats, elephants and some groups of sharks.
Note: The process of fertilization in the animal kingdom takes place in two ways – either the one where fertilization takes place externally, where the sperm-egg fusion occurs outside the female body known as external fertilization or the other where the sperm-egg fusion occurs inside the female body, known as internal fertilization. Animals are categorized on the basis of this into oviparous and viviparous animals.