In his theory of Cognitive development, Jean Piaget proposed that humans progress through four developmental stages: the sensorimotor, preoperational, concrete operational and formal operational period.
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to be happy and sad depending upon situation
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A low percentage of transferrin saturation may be a sign of iron deficit in the body. It is suggestive of some types of anemia and it is usually correlated with a low level of hemoglobin. The types of anemias that shows a low percentage of transferrin saturation are iron-deficiency anemia and anemia of the chronic disease.
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