The proces by which evolution occurs

Natural Selection

Explanation:

New traits can come from between populations. For example: migration, or between species, in horizontal gene transfer. The Evolution occurs when these heritable differences get common or rare in  population.

i believe you are looking for natural selection

Explanation:Evolution occurs when these heritable differences become more common or rare in a population, either non-randomly through natural selection or randomly through genetic drift.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this