Walleye like the fish? Orrr is it another term
Answer:
A
Explanation:
Today, the atmosphere holds about 21 per cent oxygen. ... When the first simple organisms appeared in the oceans more than 3.5 billion years ago, the atmosphere was mostly nitrogen, hydrogen, water vapor, and carbon dioxide
Question 3 is a scientific question because it can be experimented and answered by science.
Hope that helps!
