Which language construct is used for error handling in ABAP?

The correct choice for error handling in ABAP is to use the TRY...CATCH construct. This language feature allows you to manage exceptions effectively during program execution, enabling the application to respond to errors without crashing. When you implement TRY...CATCH, you can enclose a block of code that might generate an exception within the TRY block. If an exception occurs, control is transferred to the corresponding CATCH block, where you can define how the error should be handled, such as logging the error, providing a user-friendly message, or taking alternative actions.

In contrast, the other options do not serve the same purpose in error management. ASSERT is primarily used for debugging purposes, allowing you to assert conditions during program execution, but it will terminate your program when an assertion fails rather than allowing for error handling. DEBUG is a tool for interactive diagnosis of program execution and does not directly handle errors. ERROR is not a recognized language construct in ABAP and does not offer functionality related to error handling. Thus, TRY...CATCH is the most appropriate and robust method for managing exceptions in ABAP.