Respuesta :
They provide a buffer against storms between the mainland and the sea.
What are estuaries?
Estuaries are places that lie in between the mainland and the sea. An estuary serves as a point where salt water mixes with fresh water.
It is necessary to protect an estuary because they are very important in the ecosystem. They provide a buffer against storms between the mainland and the sea.
Learn more about estuaries: https://brainly.com/question/17564221
They provide a buffer against storms between the mainland and the sea.
They collect nutrients that would otherwise be washed out to sea.
They serve as homes for shellfish and other wildlife. I'm pretty sure those are the answers, hopefully it helps!