<span>Billy is having trouble in the concept of conservation, which is part of the concrete operational stage of cognitive development.
Trouble in conservation means that Billy is unable to understand that a change in the form of an object does not necessarily mean that the quantity of it has changed. In this instance, Billy has not acquired the ability to understand the 1/2 full glass of orange juice does not increase in quantity when it's poured in his favorite (smaller glass) and reaches its brim.</span>
I can't entirely see the picture.
The correct answer is generosity, fairness.
Values refer to an individual's idea of what is right and ethical in life. Values also set standards for an individual's behavior and conduct. Generosity refers to a value where a person believes in sharing, giving and extending oneself to help others. The value of fairness refers to when a person believes in equality, justice and parity for everyone.
