In piaget's theory, the stage of development between birth and 2 years of age, in which the individual uses senses and motor abilities to interact with objects in the environment, is called the stage.
a. concrete operations
b. sensorimotor
c. preoperational
d. formal operations
e. schematic

Sensorimotor stage

Explanation:

The sensory-motor stage is the first stage out of four stages given by Piaget's theory of cognitive development. It starts from birth to 2 years. It is the periods of rapid growth. the child learns through his senses and actions. The child use assimilation and accommodation process to adapt to the world.  

This stage is broken in six sub-stages:

Object permanence, the object concepts which is related to the existing and event occurs in the world independently of self actions

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the united states is a democratic republic. residents elect representatives to governmental, nation, and local administration; those deputies create the regulations that command u.s. community. although emptiness in u.s. law needs it, in usage, the administrative system is ruled by executive factions.