Question

During childhood, development is not so rapid as infancy.

Answer 1

It is because that he need some help from others and also he uses his malik which the mother gives to him...

Answer 2

During childhood, physical development is not so rapid as in infancy.

In the initial stage, the physical development of an infant is very quick but at the later stage, the physical development of a baby is not that rapid. We see that a child grows in a very short time span while development in adulthood takes place at a very low pace.