Which of the following is an example of a ‘runtime error’?I. Karel crashing into a wallII. Leaving a semicolon off the end of a commandIII. Using the wrong syntax in an if/else statementIV. Not closing all open brackets

The example of a 'runtime error' from the options provided is I. Karel crashing into a wall.

Here's why:

I. Karel crashing into a wall: This is a runtime error because it occurs during the execution of the program. Karel is a robot from a programming language used to teach programming and problem-solving skills. If Karel crashes into a wall while the program is running, it's a runtime error because the program can't continue to execute.

II. Leaving a semicolon off the end of a command: This is a syntax error, not a runtime error. The program won't run at all if there's a syntax error like missing a semicolon.

III. Using the wrong syntax in an if/else statement: This is also a syntax error. The program won't run if the syntax of the if/else statement is incorrect.

IV. Not closing all open brackets: This is another syntax error. The program needs all brackets to be closed to run. If they're not, the program won't start, so it's not a runtime error.