Final answer:
Jean Piaget is best for exploring children's ideas, Lev Vygotsky for teaching strategies, and the information processing approach for understanding memory, matching option (c) Piaget, Vygotsky, information processing.
Step-by-step explanation:
When considering the three tasks of exploring children's different ideas about the world, getting a general strategy for teaching, and figuring out how memory operates, different theorists provide different insights. Jean Piaget, with his theory of cognitive development, offers the best perspective on exploring children's different ideas about the world, as he focused on how children think and reason through distinct cognitive stages and develop schemas to interpret their experiences. For a general strategy for teaching, Lev Vygotsky's socio-cultural theory provides valuable insights, as he emphasized the role of social interactions and cultural tools in cognitive development. Lastly, the information processing approach, which likens human cognition to computer processing and emphasizes the mechanisms of memory, is most applicable to understanding how memory operates.
Thus, the order that aligns with these insights would be Piaget for children's perspectives on the world, Vygotsky for teaching strategies, and information processing for memory operations, which corresponds to option (c) Piaget, Vygotsky, information processing.