Sexual intercourse. The developing of the female egg cells and the production of sperm cells
        
                    
             
        
        
        
Answer:
A 
Explanation:
 BECAUSE LOOK AT THE PEDIGREE. IT SHOWS U
 
        
                    
             
        
        
        
Answer:
C
Explanation:
Because the student is observing the effects on the population, so it would make more sense to add more fish to the tanks to see how they would get effected.