It is simply a rhyme scheme. Every alternating line of the poem, the last words rhyme. That is the use of a rhyme scheme. I wouldn't say there is a 'which' to a rhyme scheme.
Answer:
by not being racist, and treating everybody equally
Explanation:
"Edward" delivered his sermon in this way just not to grab attention, but to convince them to turn away from their wicked ways and to accept "God"...
I hope this helps, have a blessed day!!