Species selection. Species selection is the process by which intrinsic biological characteristics in organisms change depending on the type of environment they're interacting with. In this case, the subsequent generations of the fly lost the ability to fly because their environment didn't require them to use wings for survival, hence they stopped growing them and subsequently lost the ability to fly.
This is the process called cellular respiration,it requires sunlight, glucose and A)Oxygen.
4.Necleic Acids is that answer
