I think its movement of water across a membrabe
Answer:
Feathers initially evolved in a role associated with sexual selection.
Explanation:
In species where only males had feathers, these feathers can be considered to have evolved into a role associated with sexual selection. This is because in these species, males used their feathers as a sexual attraction for females, in this case, females chose the males that had more attractive feathers to mate and generate new individuals for the species. An example of this can be seen in the peacock, where the tail with lush feathers is only present in males and is intended to sexually attract females.
Artificial selection is one very expensive but can also create mutations that we don’t want. Some harmful to us and the animal. Artificial selection can also change the life span of the animal to a much shorter one