Final answer:
The income statement reflects the performance of a business over a period of time, summarizing revenues and expenses to show a net income or loss.
Step-by-step explanation:
The financial statement that reflects the performance of a business over a period of time is the income statement, also known as the profit and loss statement. This statement provides a summary of the company's revenues and expenses during a specific period of time and concludes with the net income or loss for that period. It is one of the primary financial statements used to assess a company's financial performance. The information usually covers a fiscal quarter or year, in this case, the year ended 31st December 2020.