ais a group of words that stand together as a single grammatical unit typically as a part of clause or a sentence

the answer to the question is a

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: )!