Answer:
rhyme scheme.
Step-by-step explanation:
The given lines are an example of rhyme scheme.
A rhyme scheme can be defined as the sound at the end of each verse in a poem. This is a repetitive sound that occurs at the end of each verse in a song or poem. There are various types of rhyme schemes in literature such as internal rhyme, slant rhyme, etc.
In the given lines, the end of each verse rhyme with each other, that is sky and high. Therefore, the correct answer is option A.