A sensitive period in development can best be described as?
1) a stage of development in which children display unpredictable (and often inappropriate) emotional responses.
2) a period during children's cognitive development in which they are highly distractible and so are frequently off-task in the classroom.
3) an approach to teaching or parenting that takes a child's developmental level into account.
4) an age range during which environmental conditions are most likely to have an effect on a particular aspect of a child's development.