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_____e-commerce relies on text-to-speech technologies.
Lev Vygotsky
A Soviet psychologist known for his work on cognitive development, particularly the social development theory which emphasizes the role of social interaction in the development of cognition.
Conservation
The protection and preservation of natural resources and the environment to prevent depletion and degradation.
Physical Properties
Characteristics of a substance that can be observed or measured without changing the substance's chemical composition, such as density, color, or melting point.
Objects
Physical items or entities that can be perceived by the senses.
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