<h2><u>Answer:</u></h2>
Researchers can decide whether oxygen existed in Earth's Archean air by searching for oxidized iron in rock. In the first place, there was just an almost no oxygen in the air. The oxygen that are being created by cyanobacteria is sufficient for the enduring procedure.
There will sufficiently just oxygen that will stay in the climate when the stones at the surface are appropriately and enough oxidized. In any case, as time passes by, confirmations said that the measure of oxygen in the Archean air is really expanding in a moderate enduring pace.
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The correct answer is C. Ozone
Explanation:
Ozone is a type of gas formed by oxygen that can be found mainly in the stratosphere that is the layer found from around 8km to 60 km above the Earth's surface. Additionally, the ozone is the gas that absorbs ultraviolet radiation produced by the sun, also called UV radiation, this function of ozone is quite important because an excess in UV radiation causes burns in the living organism and leads to dagame in tissues. However, an excess of ozone can also lead to the greenhouse effect. According to this, it is ozone the component or gas that absorbs damaging ultraviolet radiation from the sun.
<span>standardizes rules for the country; reduces conflicts between different levels of government</span>
