C they were white at one point to camouflage with the trees but after and during the industrial revolution soot from factories turned many of the trees black with dust... so eventually they turned black
The ocean has separate layers which are also known as the zones of the ocean.
<u>Explanation:</u>
The surface layer of the sea is known as the epipelagic zone and stretches out from the surface to 200 meters (656 feet). It is otherwise called the daylight zone since this is the place the greater part of the obvious light exists.
There are five zones or layers in the ocean which are the following : Epipelagic Zone (Sunlight Zone), Mesopelagic Zone (Twilight Zone), Bathypelagic Zone (Midnight Zone), Abyssopelagic Zone (Abyss), Hadalpelagic Zone (The Trenches) The Hadalpelagic zone is also called the Trenches and is found from the ocean basin and below
C or d I think def not a or b