Answer:
a. indifferent
Step-by-step explanation: As a poem written in honour of a lost friend and relative-to-be, the poet here describes in a beautiful form of poetry, how he perceives that nature seems indifferent to anyone's life as anyone may pass away with apparently no reason whatsoever whilst others do not. Just as the first few lines of this lyric perfectly summarize the whole idea of the poem, ..." A thousand types are gone: I care for nothing, all shall go." Usually in a scarped cliff or quarried stone, you may find fossils and all that is bygone, and such is his feeling after relating it to the passing away of his very young in-law.