Seawalls are hard engineered structures with a primary function to prevent further erosion of the shoreline. They are built parallel to the shore and aim to hold or prevent sliding of the soil, while providing protection from wave action (UNFCCC, 1999).
Making the world better, one answer at a time. Vygotsky is best known for is theory of language acquisition, particularly the idea of scaffolding and the zone of proximal development.
The Soviet psychologist L. S. Vygotskii was the first to adopt the concept of externalization as a principle in his cultural-historical theory of behavior. A major tenet of the theory is the idea that man has mastery over himself as over a force of nature from without, and that he achieves such mastery by means of the specific symbolic techniques created by culture.