A. accelerate decay of plant materials
B. prevent disease attacks
C. prevent aquatic plants from competing with fish
D. keep fish activities normal
E. improve the quality of fish
Correct Answer:
Option D – keep fish activities normal
A. accelerate decay of plant materials
B. prevent disease attacks
C. prevent aquatic plants from competing with fish
D. keep fish activities normal
E. improve the quality of fish
Correct Answer:
Option D – keep fish activities normal
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