Answer:
B
Explanation:
The letter B represents the spectrum of stars which usually presents itself as a continuous and luminous band, containing all the colors of the rainbow interrupted by dark streaks. These streaks are the "fingerprints" of the stars, revealing the chemical composition of the star's surface layers.
Each chemical element has the property of displaying rays in the spectrum at characteristic wavelengths. By comparing the star rays with those obtained in the laboratory (with the "signatures" of the chemical elements) it is possible to determine the composition of the star.
