A newly uncovered Viking fortress on Zealand Denmark's largest island are shaped like a ring and may have served as a military training ground for Viking attacks on England

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Explanation:

A Viking fortress newly discovered on Zealand, Denmark's largest island, might have served as a launching-off point for Viking attacks on England, the Telegraph reports. The fortress is shaped like a ring and is the fifth of its kind to be discovered. All five are in Denmark.  

This, however, is also the first fortress of its kind that archeologists have found in more than 60 years, and, at 475 feet in diameter, it's the third largest ever discovered.

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: )!

line 5 is one of them idk the other one