The rhyme scheme is the practice of rhyming words placed at the end of the lines in the prose or poetry. Rhyme scheme refers to the order in which particular words rhyme. If the alternate words rhyme, it is an “a-b-a-b” rhyme scheme, which means “a” is the rhyme for the lines 1 and 3 and “b” is the rhyme affected in the lines 2 and 4.
Roses are red (a)
Violets are blue (b)
Beautiful they all may be (c)
But I love you (b)
The above is an “a-b-c-b” rhyme scheme.