Final answer:
To close all open objects at a time in a software application, right-click a tab and select an option such as 'Close All', 'Close All Tabs', or 'Close Other Tabs' from the shortcut menu.
Step-by-step explanation:
The student is referring to a feature typically found in software applications where multiple documents or objects can be open in separate tabs within the same window. To close all open objects at one time, you would right-click on one of the tabs and then click on the option that says 'Close All' or sometimes 'Close All Tabs' or 'Close Other Tabs' in the shortcut menu. This function quickly closes multiple open items, which is particularly useful in programs like web browsers, text editors, or integrated development environments (IDEs), where you might have numerous files or websites open simultaneously.