Answer:
a) Conservation
Explanation:
In psychology, Jean Piaget developed the Theory of Conservation, which refers to the thinking capacity of an individual that enables him / her to comprehend that even after the physical appearance of an object is modified, like its shape or size, it remains the same.
According to Jean Piaget, this capacity is not developed until the concrete operational stage of a person, which starts around age seven.
Therefore, the correct answer is a) Conservation.
