Human beings are

Solution:

? Correct answer is option D

• The egg of birds and reptiles is rich in yolk and supports the full development of an embryo. They lay eggs and are called oviparous animals. The human egg is not rich in yolk and cannot support the development of an embryo. Hence, the development of embryo occurs inside the body of the female parent. Humans are thus viviparous animals giving birth to young ones.
• The process of development of an embryo from an unfertilized egg is known as parthenogenesis. It occurs in bees, aphids, water fleas, etc. 
• Ovo vivipary is the phenomenon when an embryo develops inside an egg and remains in the body of the mother until hatching