B. Solar flares
The auroras are caused by space dust particles reflecting and mixing with earth’s atmosphere
I'd say option 4, because all of those are capable of changing the enviroment
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An experiment is a process where the a scientist tests and draws their evidence and data from. Hence, this process is where the hypothesis be supported or negated.
Variables are traits, factors, or characteristics that either manipulated or measured being the subject to become the data.
The independent variable is B.
<span>the presence of the new antibiotic</span>
