Gregory is a 6-month-old baby boy. He is learning about his environment through touching things, putting things in his mouth, and scooting around on the floor. According to Piaget, Gregory is in which stage of cognitive development?1. Preambulatory2. Preoperations3. Concrete operations4. Sensoremotor

As per the question, Gregory is demonstrated as the 'sensorimotor' stage of cognitive development. This stage of cognitive development is demonstrated as the stage in which a child learns or gains an understanding of the world around him through the senses or various motor movements/actions i.e. 'trial and error method'. Thus, Gregory learns from the environment through actions and senses('touching things, putting things in his mouth, and scooting around on the floor') which reflects 'Piaget's 'sensorimotor' stage of cognitive development. Therefore, option 4 is the correct answer.