Air, water, weather, temperature and other organisms.
Ill need to know what change you predicted, but natural selection can contribute to the change by allowing the organism with the mutation (advantage or disadvantage) to either parish or aid in its survival, resulting in that mutation to be passed on the other generations through breeding
Wrong, everyone makes mistakes
Obviously sun plants are increasing more than shade plants by Light intensity and Rate of Photosynthesis. The Shade plants are decreasing by Light intensity