Why is it necessary to make adjustments to some general ledger accounts at the end of the fiscal period?

Adjustments to general ledger accounts at the end of the fiscal period are necessary to ensure that financial statements accurately reflect the company's financial position and performance. These adjustments account for accrued expenses, deferred revenues, and other transactions that may not have been recorded during the period. By making these adjustments, businesses adhere to the accrual accounting principle, ensuring revenues and expenses are recognized in the period they are incurred, thus providing a true and fair view of the company's financial health.