for changing the enviroment: overpopulation changes the enviroment(not a very good exammple), beavers change the enviroment, all nesting animals create small enviroment for their young, there are thousands of things ants do. I suppose you want examples only of social evolutions and not biological(the monkeys is the best example I know of exept for ravens). in respons for the judging I meant that we don't know how they think so we have no idea whats going on in thier brains.
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