Answer:
why the author wrote the text
Explanation:
To identify the author purpose you have to ask the reason for writing the text
Vacancy. the consonant being v, the beginning aca, and end ncy. So, V-aca-ncy.
I believe that what is wrong with the sentence is that it never says what he was the cofounder of - the order of the words in the sentence is a little funky. It should be rewritten like this:
Mick Fleetwood is best known as the cofounder of the rock band Fleetwood Mac, where he played the drums.