Answer:
Either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke.
I’m assuming it would be body structure, considering you can always become more intelligent and your personality changes overtime and there are ways to control your weight.
Density=mass/volume this the density equation. hope it helps
so first of all the word abiotic means non living and the word biotic means living
so an example is that say a rabbit has just drowned in a pond the water is no longer able to be drunken by other animals or else they might be affected by it or what ever the bunny happened