Examlex
Practices such ranchers allowing their livestock to overgraze grasslands contribute to ________________ of the habitat.
Vygotsky
A Soviet psychologist, Lev Vygotsky, known for his work on cognitive development, especially the social-cultural theory of development.
Piaget
A Swiss psychologist known for his pioneering work on child development, particularly his theory of cognitive development that describes how children develop logical thinking.
Abstract Symbols
Representations that stand for ideas or concepts without having a physical form, used in various forms of communication and thought.
Vocal Abilities
The capability to produce sounds using the vocal tract, important for speech and singing in humans.
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