Answer:
Organisms are better adapted to their environment.
Step-by-step explanation:
Natural selection will make certain traits beneficial and let the organism with that trait have a higher chance of survival. The trait that natural selection favors will be vastly different depending on the environment. Green skin color in green grassland can help the individual to conceal themself, but it won't work in savana where the grass is yellow.
The end result of natural selection will cause most organisms there to have favorable traits for that environment.