Final answer:
The sensorimotor stage occurs from birth to about 2 years old, and it is where children learn about the world through their senses and motor behavior, culminating in the development of object permanence.
Step-by-step explanation:
Sensorimotor Stage Age Range
The sensorimotor stage is the first stage in Piaget's theory of cognitive development, and it spans from birth to approximately 2 years old. During this timeframe, a child engages with the world through their senses and motor actions, exploring and learning in an active and physical manner. As infants begin to interact with their surroundings, they develop key cognitive milestones, such as understanding that objects continue to exist even when not in view, a concept known as object permanence, which tends to manifest between 5 and 8 months of age. It's within these early years that a child's ability to comprehend their environment takes shape, and with it, their capacity to solve problems, communicate, and recognize the constancy of objects in their world, paving the way for more complex cognitive processes as they grow.