Love, affection, concern & generosity judiciously bestowed on growing children, have very desirable effects. Poor environment retard development of intelligence. Intelligence helps in adjustment & inventions An intelligent person has the ability to adjust himself to the changing circumstances with ease, efficiency and speed. He has the capacity to assimilate ideas very quickly and clearly. He can cope With new situations very successfully. All the inventions of the word can be attributed to persons of very high intelligence.