Answer:
C
Explanation:
The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top. Based on this, layer C is oldest, followed by B and A. So the full sequence of events is as follows: Layer C formed.
Ozone, which is also known as trioxygen, is a chemically bonded compound, and contains three oxygens.
The plant is the organism that uses the sun’s energy and make it available to other organisms