Answer:
stage four
Step-by-step explanation:
Sensorimotor development is a stage of development in which a childs develops coordination between arms, legs and hands and begins to receive sensory experience through smell, taste, sound, touch and light. It extends from birth to 2 years.
In stage 4 of sensorimotor development, the behavior of the infants become goal oriented. Infants try to reach an object or find a hidden object. It is also called as stage of co-ordinating secondary schemes.