What reason does edward abbey give to prove that he is the best person to comment on the harm the building of the glen canyon dam has done to the land?

What does the line rage, rage against the dying of the light from the poem "do not go gentle into that good night" have in common with the line ride the six hundred from the poem "the change of the light brigade? "a. they end each stanzab. they are repetitious linesc. they end a sestetd. they begin an octave