Answer:The answer is tiny organisms known as cyanobacteria, or blue-green algae.
Explanation:
These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and oxygen increase. Additionally, some sources you could use that I used to answer this question was
https://www.scientificamerican.com/article/origin-of-oxygen-in-atmosphere/
It only can focus on high powers
Circular Flower [CC] (Dominant)- 100%
Square Flower [cc] (Recessive)- 0%
C. The answer should be c, seeing as how bacteria die under high heat.