Question

Ten-month-old mark gleefully drops his spoon to the floor from his high chair for the tenth time. he smiles as the spoon drops from his hand and he is quite pleased when it bounces on the floor. he laughs when his older sister hands it back to him to try again. mark's behavior indicates that he is

Answer 1

mark's behavior indicates that he is developing conventionality
In child development, developing refers to making conscious effort in order to achieve a certain goal.
Even though the scale of these goals might be really small in this age, it shows a positive growth of cognitive abilities.