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.
colônias americanas começaram a irritar um ao outro quase incessantemente. Como um pai impaciente com uma criança rebelde, Grã-Bretanha tentou métodos diferentes para incutir disciplina.
Answer:
I think it's slowly splitting apart
Explanation:
Iceland's position on the boundary between the Eurasian and North American tectonic plates means it's 'slowly being split apart'
