Question

2. A fish lays a large number of eggs at a time. Why do only a few of
them hatch?​

Answer 1

Answer:

The fish lay eggs and sperms into the water randomly so not all eggs get fertilized since the sperm might not reach them

Answer 2

Answer:

Fish lays large numbers of eggs at a time, but few can survive of them because all eggs are not develop well and out of them only few eggs can able to grow and survive into adult.,. And sometimes there is a chance of eggs being eaten by predators even getting destroyed.

Explanation:

That's why few eggs are survive.