Hello,
The answer is option B "the regular pattern of rhyming words in a poem or stanza".
Reason:
A rhyme scheme is a pattern of rhymes at the end of each line of a stanza in a poem:
For example:
"He used to like to hop like a frog"
"but now he eats like a hog"
The pattern is hog, and frog therefore the answer is option B!
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit
