<u>Answer:
</u>
The build-up of three oxygen created our ozone layer around two billion years ago.
<u>Explanation:
</u>
- The ozone layer is a part of the stratosphere which is located right after the troposphere in the atmosphere of the Earth.
- The ozone gas is made up of the abundance of three oxygen molecules combining with the ultraviolet radiation emitted by the Sun.
- The development of the ozone layer happened around two billion years ago when the oxygen concentration levels on the planet began to rise slowly and gradually.
The answer is Darling and Murray are the two rivers located in south central Australia.
Best describes Antarctica are known as reserves of oil and coal as well as mineral deposits in Antarctica.
<h3>What do you mean by Antarctica?</h3>
Antarctica is known as reserves of oil and coal as well as mineral deposits Antarctica although detailed knowledge of these mineral deposits.
There are deposits of minerals in Antarctica including coal and iron ore. Antarctica refers to the major source of oil and coal for the world.
Therefore, C is the correct option.
Learn more about Antarctica here:
brainly.com/question/8533665
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