Final answer:
The section underlined in red indicates a declared checked exception in the given Java code snippet.
Step-by-step explanation:
The section underlined in red in the given Java code snippet indicates that it is throwing a declared checked exception.
In Java, checked exceptions are the exceptions that the method must either handle or declare to be thrown. In this case, the FileWriter constructor can throw an exception of type IOException. Therefore, the method that contains this code snippet must handle the exception or declare it to be thrown using the throws keyword.
To handle the exception, you can surround the code with a try-catch block and provide the appropriate error handling or recovery mechanism.