Aconcept developed by alfred binet, is an individual's level of mental development relative to that of others.

The answer to this question is Mental Age concept
Alfred basically invented the earliest version of an IQ test. He believed that mental age is not necessarily affected by how old a child is, but rather than influenced by genetic factors that could affect children's intelligence even since early age.

The  frame of government of pennsylvaniawas a constitution for the  province of pennsylvania a  proprittarycoony granted to  william penne by  charles ii of england. the frame of government has lasting historical importance as an important step in the  development of american and world democracy.