How are sand, water, wind, and living things interacting in this dune system?

What are the interactions of a dune ecosystem?

What is a dune ecosystem? How do dunes help protect the living things (including humans) that live in a coastal system After watching this video, think about how sand, water, wind, and living things interact in a dune ecosystem.

What is wind? How does it affect the things on the surface of the Earth?