Ok, now that I've had time to calm down, let me address things.
I've thought about it and let me put things down in a sort of proof. We can then take things one by one.
1) Would you agree that species in a population have various phenotypes? There are differences in charactieristics. There may be polar bears with longer claws or some with shorter claws. Some finches with bigger beaks and some with smaller?
2) Do you agree that these characteristics may be controlled by genes. That is, some of us have genes for blue eyes and some for brown eyes? The finches with bigger beaks have genes that code for bigger beaks, conversely the finches with smaller beaks have the genes that code for smaller beaks. NOTICE THAT NOWHERE AM I SAYING THAT THESE ARE MISTAKES BY GOD. God designed some of us with some genes and others with other genes.
3) Would you agree that these characteristics governed by genes SOMETIMES fit the environment better. than other characteristics. The larger beaks can exert exert more force than smaller beaks and thus break open larger seeds. Conversely, the smaller beaks can open seeds with less energy needed to built the beak. Polar bears with longer claws may be able to break open thicker ice.
4) Do you agree that environments can fluctuate with regards to resources? Some years more rain, more seeds, more salmon, less salmon, more wind, less wind, less oxygen dissolved in water...etc
5) Would these changes in the environment mean that some animals (or plants) within the population might have characteristics that fit the resources available. Again, some years the finches with larger beaks might fit the bill
6) If the finches with larger beaks have more babies that year and conversely the finches with smaller beaks have fewer babies that year, then they pass down their genes for larger beaks and then the next generation of finches will have a higher frequency of finches with larger beaks. Maybe this year the rainfall is different and the opposite matings occur. the next generation will switch back to smaller beaks.
7) Now, whether or not these environmental changes occur as a result of normal shifts in weather patterns or the influence of man, the animals (and plants) will survive or reproduce according to their matching the environment. Thus, (AGAIN! in fact I think three times now) IF we are changing the environment of the polar bears and IF this is change is too drastic for the polar bears (ie they do not have the necessary genes to allow some of them to match the environment) then they will die. It is selection, but it is selection brought about by our influence (bolded so it is clear that this is my answer) it is both. It does not have to be one or the other despite your insistence.
Now, I have never strayed from the topic these all have to do with populations, selection, and genetics. Why don't you go through each of these points and maybe we can be clearer about what you disagree with.
Regards (off to walk the dog and watch our LAX game)
Zoegirl