19. Why does sound become weaker or fainter as it moves away from the source?
A. The sound is already absorbed by the environment.
B. The sound spreads to cover a smaller area.
C. The sound spreads to cover a larger area.
D. The sound is absorbed by the source.
A. The sound is already absorbed by the environment.
B. The sound spreads to cover a smaller area.
C. The sound spreads to cover a larger area.
D. The sound is absorbed by the source.
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Answer:
C. The sound spreads to cover a larger area.