Which statement is true regarding the Lock Formula option in the Expressions dialog box?

The statement regarding the Lock Formula option in the Expressions dialog box being particularly useful for protecting important expressions from being modified is accurate. Locking an expression serves as a safeguard, ensuring that critical formulas are not inadvertently altered during model changes or updates. This feature is beneficial in a collaborative environment or complex projects where multiple users may have access to the design, keeping essential calculations secure from accidental edits.

When an expression is locked, it indicates to users that modifications to that specific formula should be avoided unless absolutely necessary. This is a crucial aspect of maintaining the integrity and reliability of designs, as unintended changes can lead to errors and affect the overall functionality of the model.

In contrast, while other choices may imply certain features of the Lock Formula option, they do not accurately capture the primary intent and utility of this feature. Therefore, understanding the protective nature of locking expressions highlights its value in managing critical design elements.