>> There are also some issues or controversies in development.
The first, does nature
or nurture have the strongest influence on development,
we've briefly touched already.
While you will still find some outliers,
most researchers now believe that they work together.
The second is whether children are active, growing organisms
that set their own development in motion,
or that they are reactors to environmental input.
And the third relates to how development happens.
Is it a steady, continuous process like the sapling
that grows into a sturdy tree, or does it occur in steps
and stages like the insect that goes
through the distinct stages of their lifecycle?