A star can be classified according to the following: main sequence, giants, and supergiants. On the other hand, the spectral class of a star is classified according to their temperature, absolute magnitude and solar luminosity.
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<span>Based on an existing classification, a star with an identified spectral class of M2 and a magnitude of +15 would be classified as a main sequence star.</span>
D due to the surrounding environment
Answer:
Explanation: Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of chemical substances or energy, such as noise, heat, or light. Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants.
Believes it was American B-17’s that were due from the US mainland
