Explain how a business uses each one of these accounting concepts and why is it important?

Here are the concepts:

1. The balance sheet.
2. The trial balance and preparation of financial statements.
3. Preparing the trial balance.(step 4 of the accounting cycle)
4. The worksheet.(step 5 of the accounting cycle)
5. Closing entries.(step 8 of the accounting cycle)
6. The bank reconciliation process.
7. Preparing a payroll register and maintaining an employee earnings record.
8. Journalizing transactions for a perpetual inventory system.
9. Purchases and cash payments in a perpetual inventory system.
10. Cash payments transactions and schedules of accounts payable.