Peggy’s parents are amazed at how much their daughter has changed. over the past year, she became interested in doing chemistry experiments. peggy predicts what will happen when she combines two chemicals together and then observes the results to see whether her hypothesis was correct. peggy is most likely in the stage of cognitive development.

Formal operational.

Explanation:

Cognitive development refers to the development of thought and information processing in children. It includes the development of perceptual skills, knowledge, dispositions, language learning and other aspects that develop a child's brain into an adult brain. As per the question, Peggy is in the 'formal operational' stage of cognitive development that illustrates the fourth and final stage of cognitive development. It starts at the age of twelve and ends with adulthood. At this stage, the child begins to think in a more sophisticated and advanced manner and develops the ability to think abstractly. They gain the ability to manipulate ideas.  Thus, Peggy's action displays the growth of reason and logic in her thoughts. Therefore, the answer is the 'formal operational' stage.

sis. it's been a while since a read that and had that class so i can't answer for u

it the climax in the poem