Answer:
Substage 2: First habits and primary circular reactions (1-4 months)
Explanation:
Based on the information provided within the question it can be said that the substage of the sensorimotor stage that is being described would be Substage 2. This substage deals with first habits and primary circular reactions, and occurs in children between 1 to 4 months of age. The children begin to adapt their reflexes and actions into integrated activities during this substage.