What is the advantage of indirect development over direct development in the postembryonic stage of ontogenesis?

With direct development, no transformations occur, the embryo resembles a reduced adult. In the case of an indirect organism, before the transition to an adult state, it undergoes a number of changes: a larva emerges from the egg, which then either becomes an adult or goes through metamorphosis.
The advantage of indirect development is ecological in nature. As a rule, the ecological niches of larvae and adults do not overlap, which avoids competition and increases the survival rate of the offspring. For example, the beetle larvae feed on plant roots, and the adult beetle feeds on leaves.