How do the underlined phrases support the author's purpose?

How do the underlined phrases support the author's purpose? They show that the worst part of the train ride may be over. ... In this passage, the author suggests that cruelty can occur when people face horrible conditions.

what’s your question?

the answer would be: it explains that at least one son must join the church

the expression ''as the tithe of his sons'' indicates how his father intended for at least one of his sons to serve the church. this phrase demonstrates that his father offered him as a last resort since none of his brothers chose to serve the church.

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