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.
Decomposers help reclaim carbon from dead organisms and put it back into the carbon cycle so living organisms can use it. Decomposers break down dead plants, animals and waste products. This process releases carbon dioxide through cellular respiration
