Final answer:
In reproductive strategies of vertebrates, oviparity refers to egg development with nourishment from a yolk outside the female's body, while viviparity relates to giving birth to live young who are nourished by the mother internally.
So, the correct answer is A.
Step-by-step explanation:
The reproductive strategies of vertebrates fall into three categories: ovipary, ovovivipary, and vivipary. The term that applies to egg development within the female with nourishment derived from a yolk is oviparity. In oviparity, the embryo develops within an egg that is laid outside of the mother's body. This reproductive strategy is seen in most amphibians, reptiles, and all birds. On the other hand, viviparity refers to the young being born alive and obtaining their nourishment directly from the mother, a method common in many mammals as well as some species of cartilaginous fish and a few reptiles.
In the context of the matching exercise provided, the correct answer would be: a. oviparity. This defines the process where eggs are laid and the embryo develops externally, nourished by the egg's yolk.
So, the correct answer is A.