Sulfur has six valence electrons, meaning that each atom of this element has six electrons in its outermost shell.
Limiting factors, such as carrying capacity, competition between species, natural resources, food, shelter, water, adaptation to the environment, etc.
The color change in the moth was proof of evolution due to the fact that whenever the Industrial Revolution occurred, it caused the moths to become a darker shade. The dark colored moths kept increasing until the pollution was reduced and the original, lighter colored moths started resurfacing
