Three-spined stickleback fish (gasterosteus aculeatus) show substantial heritable variation in gill-raker length related to differences in their diets. longer gill rakers appear to function better for capturing open-water prey, while shorter gill rakers function better for capturing shallow-water prey. which of the following types of selection is most likely to be found in a large lake (open water in the middle and shallow water around the sides) with a high density of these fish?
a) directional selection
b) stabilizing selection
c) disruptive selection
d) sexual selection

disruptive selection

Explanation:

Disruptive selection -

It is also known as the diversifying selection ,  it enables to describe the changes in the genetics of the population , in which the trait that is favored is the extreme over the intermediate values .

In case of disruptive selection , the trait variance increases and the population is distributed into two groups .

And , in this case the more individual acquire the peripheral character value in the both ends of distribution curve .

Hence , from the information of the question , the correct answer is disruptive selection .

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the areas around the equator