Answer:
Comparing financial statement amounts from year to year for the same company
Explanation:
When you carry out a horizontal analysis of the financial statements of a corporation you compare how the different accounts have changed over a period of time.
For example, you can perform a horizontal analysis to determine how total costs affect net profits in the income statement. You take the 2017, 2018 and 2019 income statements and compare how total costs have evolved during that period or time, and what percentage do they represent of total revenue.