That would be Newton's third law of motion.
Errors during duplication, errors during recombination, the movement of genetic elements, and dna damage
The natural selection process applies majorly inside back species wether than between species.
A volcanic winter is a reduction in global temperatures caused by volcanic ash and droplets of sulfuric acid and water obscuring the Sun and raising Earth's albedo (increasing the reflection of solar radiation) after a large, particularly explosive volcanic eruption.
