Development refers to a qualitative change that results in an increase in structure for better and enhanced functioning of organs. Growth refers to a quantitative change that results in an increase in height, weight, and length of the child.Human growth and development are influenced by both 'Hereditary and Environment' as they are the elements that play a vital role in determining the development of an individual.The relative effects of heredity and environment vary in different areas of development? as:All mental and social traits depend on the environment.All the inborn traits, instincts, and I.Q. depend on heredity.All the potential inputs for growth and development depend on heredity.Both are complementary to each other in molding the life of an individual.How a person will develop depends on the environment but how far a person can develop depends on heredity.Heredity places limit on IQ and the environment determines the numeric position of IQ within these limits. Hence, it could be concluded that the relative effects of heredity and environment vary in different areas of development.HintHeredity: It refers to the traits that pass down from the parents to their offspring. It is the most important personality and intelligence determinant. Environment: It refers to the circumstances in which an individual lives. Child's immediate environment strongly influences their personality and intelligence.