<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.
Place is the correct answer!
By tradition, the city of Rome was founded in 753 B.C.*
But the awnser to your question is D
The Trojan prince Aeneas, an important figure linking the Romans with
the Trojans and the goddess Venus, is sometimes credited with the
founding of Rome as the culmination of his post-Trojan War adventures,
but the version of the Roman foundation myth that is most familiar is
that of Romulus, the first king of Rome.
One of them is Norway (385,155km²) ...
False
mountains form from collision of earths plates
