Question

why is the number of eggs laid by frogs at a time much higher than those laid by hens

Answer 1

The number of eggs laid by frogs at a time are much higher than those laid by a hen because of the following reasons: 1) We can see External fertilization in frog but not in hen. 2) Due to external fertilization, the female frog lays a vast number of eggs in water & males releases millions of sperms on to them.

Answer 2

because hens gives time for nurtiring