Answer:
oil spills plz mark brainliest
Explanation:
The correct answer is - cyanobacteria.
The atmospheric oxygen came from the cyanobacteria. These were one of the earliest living organisms on Earth. The cyanobacteria was using photosynthesis in order to create its own food. The photosynthesis process requires sunlight, carbon dioxide, water, and oxygen. The oxygen is mostly released as a waste product from the process of photosynthesis, thus the cyanobacteria were literally releasing oxygen that was ending up into the atmosphere. As more and more cyanobacteria there were across the planet, more and more oxygen they were releasing into the atmosphere, slowly changing the composition of the atmosphere, and setting the basis of it as we know it now.
Raw material Used to make steel
Since you provide no options,The climate that you would least likely to find in middle east/southwest asia is : Cool and wet
Most of the regions in middle east/ southwest Asia tend to be hot and dry. It's surrounded by desert with little rainfall
hope this helps