Because Cyanobacteria appeared
Cyanobacteria's excrement formed a lot of oxygen in the atmosphere which make the earth temperature cold
This allow a liquid water to formed on the surface ( because if the temperature is too high, the water will evaporate) and eventually formed oceans
Answer: the writing is too small for me
Explanation:
Answer:
that would be semi core if I'm correct
Idk but i know it is not <span>D. <span>Several countries have authoritarian dictatorships.</span></span>
