Answer:
A. Dawn: sensorimotor CORRECT.
B. Ellis: concrete operational INCORRECT
C. Fritzi: formal operational INCORRECT
D. Girard: postoperational INCORRECT
Step-by-step explanation:
A. Dawn is in the senriomot stage according to Piaget´s theory of development. This is stage is for new borns and babies. It is calles sensoriomotor beacuse cognitive abilites are not yet built. Babies at this stage develp sensorial and motor skills.
B. Elli is 4 years old, she should be in pre operational stage, at his age she is hasn't yet built concrete cognitive structures.
C. At 9 year old formal operational is not developed yet, it starts at the age of 12 according to Piagets theory.
D. At the age of 15 the formal operational stage is developed, beause symbolic operations can be done, that is understangind a line of thought and being able to draw conclusiones and make conections.