The condensation of water vapor formed the early oceans. It is an important part of the water cycle. It is easy to eliminate the other answers in this question. It can't be meteorites, living organisms, or nitrogen.
All of them are <span>Levels of Organization of Living Things
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Answer:
a niche is a specific area if habitation where an orgnism perfoms its daily activities
Most likely, it would effect many trees depending on the rate of infection and how much of this microorganism is released to the environment. I hope that helped :)