Stars, other than the Sun, are too far away from Earth to be studied by space probes. How are scientists able to study the composition of a star that is located outside of the Solar System?
A.
by evaluating the mass, density, and volume of the star
B.
by evaluating the kinds of sounds given off by the star
C.
by evaluating the different colors of light radiated by the star
D.
by evaluating the air pressure in the atmosphere of the star
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Ответ:
2. Food-producing capacity of another.
Hope this helps xD