Nope! A complete sentence doesn't start with "and" unless someone is saying it in dialouge. Also, there is no puntuation.
Momaday descibes the landscape of Rainy Mountain, which is a knoll in the Olkahoma Plains where the kiowas have lived for a long time. The weather here is harsh but Momadays evocative description of the landscape is beautiful.
The would be a because it makes more sense than the other sentences. If you read each of them a will make better sense.
I'd say "native", "mangnanimity", and maybe "justice" are emotionally charged. You can tell by the context of the sentences.
