Question

How does nature and nurture affect pubertal timing?

Answer 1

the main thing that effects the timing of puberty is genetics.  If the mother and father entered puberty on the early side more than likely the child would too.  However if one is extremely athletic, overweight or stressed out certain factors if not all parts of puberty will be delayed as the bodies natural way of coping

Answer 2

In this context, nature refers to every factors that related to environment and nurture refers to every factors that related to parenting.

Nature could influence pubertal timing thtough things like nutrients intake. Children who are given good quality diets tend to hit puberty faster compared to childre who didn't get it.
Nurture could influence it through the psychological development. study suggest that children who are born in families with good economic situation  and can afford good education tend to be mature faster compared to children who are not.