One-year-old sam is able to stand and walk. he is in the phase of motor development.

The rudimentary movement phase includes the basic motor skills acquired in infancy: reaching, grasping and releasing objects, sitting, standing, and walking. The skills of the rudimentary movement phase acquired during the first 2 years form the foundation for the fundamental phase. While Sam may only be one years old standing and walking are part of the rudimentary movement phase.

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