seas and oceans
A submarine structure where there is plants and animals
Coral Reef
The blue car stopped. It came from nowhere.
The blue car that/which came from nowhere has stopped.
McDonalds is a fast-food chain. They make the most famous burguers.
McDonalds, where they make the most famous burguers, is a fast food restaurant.
Place between sea and coast
Coastline
The plane flies to New York. It´s taking off tomorrow.
The plane that/which flies to New York is taking off tomorrow.
He won the lottery. His name is Jacob.
He, whose name is Jacob, won the lottery
The bottom of the ocean
ocean floor
We have a lot of exams. They´re very difficult.
We have a lot of exams that are very difficult.
James is a doctor. He found the cure of cancer.
James, who is a doctor, found the cure of cancer.