Answer:
If females begin using different criteria than feather colour when they choose mates, it may lead to the decrease in variation of tail feather colours as the only reason for the variation is due to the selection pressure.
Explanation:
The females choose the opposite gender as their mates based on certain criteria which include the colour of the feathers, the colour of the eyes and many more. A male cardinal's red colour is the natural means by which the selection of the opposite gender is done by the females. When other criteria matter more than this red colour, it reduces the sexual selection pressure and therefore, this neutralization may lead to the decreased variety of tail feather colours in male cardinals.
The variation is the different forms of the same traits. For example, feather color. The variation in the feather color will reduce if female Cardinals start choosing males on the basis of other criteria.
Natural Selection:
It is the process by which some organisms are selected by nature due to their variations. These variations help the organism to increase its population.
Female Cardinals choose their mate on the basis of the vibrant feather color of the male. Hence, there is a natural pressure that drives the variation in the feather color of males.
If females start using other criteria for mating, the natural pressure on the feature color will reduce.
Therefore, the variation in the feather color will reduce.
To know more about natural selection, refer to the link:
https://brainly.com/question/9830102
