They show the composition of a star.
Why are spectral lines useful in classifying stars?(1 point)%0D%0AResponses%0D%0A%0D%0AThey indicate a star's age.%0D%0AThey indicate a star's age.%0D%0A%0D%0AThey show the composition of a star.%0D%0AThey show the composition of a star.%0D%0A%0D%0AThey show a star's location.%0D%0AThey show a star's location.%0D%0A%0D%0AThey show the layers that make up a star.%0D%0AThey show the layers that make up a star.
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