Christopher columbus voyage was discovering the Americas.
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Answer:
Sensorimotor play
Explanation:
Sensorimotor play is behavior attribut common to infants to gain minimum/maximum pleasure from consistent use of their sensorimotor schemes. The development of sensorimotor play is a product of Piaget's description of sensorimotor thought in the fact that Infants at first instance are involved/engage in exploratory and playful visual and motor transactions in the second quarter of the first year of life.
In this sample the conditioned stimulus is the phone
