Answer:
To give a formal structure to the poem.
Step-by-step explanation:
One of the reasons why a poet might want to follow a uniform rhyme scheme in a poem is to give this a formal structure. This is part of the aesthetic impact that the author wants to create. However, this is not necessarily the only concern an author might have when it comes to his work. A rhyme scheme can also be used in order to give a poem a sense of rhythm, which can make it more emotional and memorable to read.