in paragraph 12 the author includes a list of jobs that will be available in a mars colony to show that

you didnt put   question but this passage would be a origin story made to explain life and death and who controls each one

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.

hope this answer you: )!