What cells are shown at step number 2 in the figure below? 
Definitions:
Educational Services
Programs or activities designed to teach, train, or inform, often provided by schools, colleges, universities, or other educational institutions.
Sensorimotor Period
The first stage in Piaget’s theory of cognitive development (birth to approximately age 2), characterized by the development of motor control and an understanding of the world through physical interaction.
Pacifier
A rubber, plastic, or silicone nipple given to an infant to suck upon, though it is not attached to a bottle or intended to deliver food.
Pleasurable
Causing a feeling of satisfaction, enjoyment, or pleasure.
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