Answer:
3
Explanation:
I think it is 3 because all other ones don't effect all types of species while three makes the most sense
They are both are types of explanations.
Out of the choices given, the mechanisms that drives evolution is natural selection. The correct answer is B, natural selection.
Answer:
D. DDT
Explanation:
DDT is highly persistent in the environment means that it break down very slowly in the environment. The half-life for DDT is from 2 to 15 years. Half-life is the time needed for the degradation of half of the compound. Persistent bio-accumulative toxic substances (PBTs) are chemicals that break down slowly in the environment and its accumulation in living organisms are toxic. Some PBTs are dispersed through air currents while some uses other environmental pathways, resulting in contamination of regions far from their points of origin.
