Explanation : Zone of proxirmal development, now called
the zone of potential development (ZPD)
is a term that Vygotsky used to explain
the range of development in learners. He
postulated that every individual has two
levels of development: a lower level that
is attainable under normal circumstances
and an upper level attainable under the
influence of an adult or capable peer;
the difference between these two levels
being the ZPD. This postulation manifests
Vygotsky's belief in the importance of
social influences, especially instruction, on
children's cognitive development.