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.
In 1926-30 Vygotsky worked on a research programme investigating the development of higher cognitive functions of logical memory, selective attention, decision making and language comprehension, from early forms of primal psychological functions.