Answer: Option B
:
B
In case of external fertilisation, the number of eggs produced ismorethan the number of eggs produced in internal fertilisation.External fertilisation usually occurs in aquatic animals.Theseanimals lay hundreds of eggs and release millions of sperms.However,many of the eggsdo not get fertilised (fuse with sperm)todevelop into new individuals. This is because the eggs and spermget exposed to water currents and wind. Also, there are other animals (predators)which may feed on these eggs. Thus, production of a large number of eggs and spermis necessary to ensurefertilisation of at least a few of them.