In choosing from the options, regarding the themes, I would say that 2) conforming to social conventions and 6) the necessity of companionship should be the two main themes in this excerpt.
,As usual in life, motives can be complicated. The theme of Ivan Illych marrying this female because of her money and her colonial position is one chance that he discusses. The other theme is that she is adorable and he sank in love with her and to some breadth she complements his thoughts on life.
The Death of Ivan Ilyich is regarded one of the masterpieces of his late novel, written shortly after his spiritual conversion of the late 1870s.
Thus, option "2 and 6" is correct.
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