<span>The correct
answer between all the choices given is the second choice or letter B. I am
hoping that this answer has satisfied your query and it will be able to help
you in your endeavor, and if you would like, feel free to ask another question.</span>
Survival of the fittest.social Darwinism that the poor are unfit and weak and the rich superior.<span />
Primary treatment<span>. In the primary sedimentation stage, </span>sewage<span> flows through large tanks, commonly called "pre-settling basins", "primary sedimentation tanks" or "primary clarifiers". The tanks are used to settle sludge while grease and oils rise to the surface and are skimmed off.</span>
