About _____ of elementary school children and adolescents are chronic victims of aggression

The book The Origin of Species was written by

a. Sigmund Freud. b. Charles Darwin. c. Sir Charles Sherrington. d. Peter and Rosemary Grant.

Children in the preoperational stage of cognitive development see the world only from their

perspective. This trait is not selfishness but rather __________ . Fill in the blanks with correct word