Concept:Schema is a mental framework that helps organize and interpret information.Explanation:Jean Piaget introduced the term 'schema' to describe patterns of thinking and behavior.These mental structures allow individuals to process and store new experiences.Schemas are essential for understanding the world and are foundational to Piaget's theory of cognitive development.The other theorists (Van Hieles, Vygotsky, Bruner) have different key contributions but not the labeling of schema.Answer:C. Piaget