Here something that might help
<span>
Most scientists believe that for half of </span>Earth's<span> 4.6-billion-year history, the</span>atmosphere<span> contained almost no </span>oxygen<span>. Cyanobacteria or blue-green algae became the first microbes to produce </span>oxygen<span> by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years ago.</span>
Answer:
the 4th one The lumen, is my guess
<em>Answer:</em>
????
<em>Explanation:</em>
Hey! I hope you had a great day so far :)
But uh...
I cannot answer that question for you.
There are no "stars" and definitely no graph on a file attached.
Sorry!
<em>Helper's Message:</em>
Hey, I hope you can give me a Brainliest :)
<em>-ChocoChocoCho</em>
