Pía Natalia Del Cid Silva
Coast: The land next to or close to the sea.
Noun. The accident happened three miles off the coast (= in the sea three miles from land).
Sky: The area above the earth, in which clouds, the sun, etc. can be seen.
Noun. Can you see those birds high up in the sky?
River: a natural wide flow of fresh water across the land into the sea, a lake, or another river
We sailed slowly down the river.