The writer creates cohesion between the first and second paragraphs of the explanatory text by repeating the idea that the blues is a lyrical musical form, specifically using the word "primarily" in the second paragraph to emphasize its nature as a sung form of music. This repetition of the concept helps connect the two paragraphs and highlights the focus on the blues as a lyrical genre.
Response: by repeating the idea that the blues is a lyrical musical form by using the word primarily in the second paragraph.