Which block is primarily used for handling errors in Python?

The use of "try and except" blocks is fundamental in Python for error handling. This mechanism allows a programmer to write code that might potentially raise an exception and to define how to respond to that exception if it occurs.

When a block of code is enclosed within a "try" clause, Python will test that code for errors. If an error occurs, instead of crashing the program, it jumps to the corresponding "except" block where the programmer can define how to handle that specific error, whether that means logging it, retrying the operation, or providing a user-friendly message.

The "try" block allows the code to attempt operations that could lead to exceptions, while the "except" block handles those exceptions, making it a structured way to manage runtime errors smoothly and effectively. This structure enhances code reliability, as it prevents the entire application from terminating unexpectedly due to unhandled exceptions.

Other options do not represent the correct combination of keywords in Python's error handling syntax, as they either mix incorrect terms or do not align with the functionality provided by the "try" and "except" model.