The behaviors that are learned throughout life are learned adaptations, such as manners, the use of cutlery, playing football, the way of behavior according to certain social standards. Those behaviors that are innate, or are physiological needs like sleep, eating food, mating, need for socializing love, not talking about the way but about the need, are not learned adaptation. Therefore, we can not say that all behaviors have been learned.
According to the offered options, the only learned adaptation is: D. A baby using a fork to eat.
