What were the drivers of each of these trends

What were the drivers of each of these trends? Which ones are supported by underlying consumer trends? Identify them.
2. Another potential trend is the return to a store’s roots. Several retailers, such as Gap and Saks, lost core customers by attempting to appeal to younger buyers. As a result, they are now attempting to return to their roots and deliver the classic fashions that made them attractive to their now not-so-young customers.
a. What possessed them to go trendy in the first place?
b. Can they recapture the customers that they have alienated?