Which situation is an example of competition that could be found in the ocean? two shark populations utilize the same fish population as their main food source

algae blooms decrease as the number of fish increase

lack of sunlight due to changes in the seasons restricts the growth of certain plants

plentiful oxygen leads to an increase in the number of reefs

A. two shark populations utilize the same fish population as their main food source

I'm guessing this is from Marine Biology. I know this is an example of competition because two different groups of sharks are eating food from the same source. If one group gets to it first every time, they could leave the other group with no food. So it is a competition.

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an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.