The main difference between retailing and wholesaling is that:

Question $2$ options:

Retailing involves selling to other merchants and wholesaling does not.

Retailing involves selling to business customers and wholesaling does not.

Technology is more important in wholesaling than in retailing.

Wholesaling involves selling mainly to other merchants and business customers, but retailing involves selling mainly to final consumers.

Wholesaling involves selling to final consumers and retailing does not.