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Biology, 27.09.2021 22:40 bossdde

Why are spectral lines useful in classifying stars? A) They show the layers that make up a star.

B) They show a star's location.

C) They indicate a star's age.

D) They show the composition of a star.

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Why are spectral lines useful in classifying stars? A) They show the layers that make up a star.
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