Ray gives his son, mason, three bowls. these bowls have the same capacity, but each one differs slightly in its shape and size. ray tells his son that one of the bowls can hold more liters of oil than the other two bowls. mason points out that all the bowls, though may appear different in size and shape, can store the same volume of oil. in this case, ray was most likely testing mason’s concept of

   Concept of conservation

Explanation:  The concept of conservation in psychology was laid out by psychologist Jean Piaget. This concept refers to the ability of perception and logical reasoning by which someone, in this case Ray, realizes that the amount of a fluid remains the same, even though the bowls in which that fluid has been poured are of different shapes and sizes. This means that Ray realizes that the liquid adapts to the shape of the bowl into which it has been poured.

It has changed in size due climate change, population growth and irrigation. It had shrunk by 90%