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Give the merits and demerits of fish culture?
 
a. A methodical approach to raising fish in a controlled environment is known as ____________.
 
b. Fish culture, also known as ___________. 
 
c. Which of the following statements is untrue about fish culture?
 
d. Which of the following is the merits of fish culture? 
 
e. Which of the following is the demerits of fish culture?