Answer:
We might just have to end it together
Explanation:
I tried to answer it now I'm stuck in the same hole -_-
The early atmosphere was probably mostly carbon dioxide, with little or no oxygen. <span>The proportion of oxygen went up because of </span>photosynthesis. The photosynthesis was conducted from <span>tiny organisms.
</span><span>cyanobacteria, or blue-green algae. </span><span>
They </span>used sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen. This change to the atmosphere was very important because the <span>breathable air we enjoy today was created.</span>
This question is hard but I found the answer from merit nation
The answer to your question is,
B) CaCl2
-Mabel <3
