Read the first paragraph of an article published in 1956.

"Yoruba Vocal Music"

Much more attention has so far been paid to the famous instrumental music of the Yorubas than to their vocal music. The fame of the "Dundun" drum, the famous talking instrument, has probably overshadowed Yoruba singing. Yet there is an immensely rich field of study even here. There is occasion in Yoruba life that is not accompanied by songs. Birth, marriage and funerals are all occasions for lyrical songs of great beauty. Everyday life is also accompanied by a great deal of impromptu singing, a kind of musical thinking, in which the singer puts everything to a tune, which happens to pass through his head.

Select the text structure that best fits the title and excerpt.

a
Compare and contrast

b
Description

c
Problem and solution

d
Sequence