What is the function of row action indicators in managing requests?

Row action indicators serve as visual notifications that highlight pending queries or actions required for particular rows within a Smartsheet. Their primary function is to help users quickly identify which requests are awaiting attention or response. This visual cue allows project managers and team members to prioritize their work effectively, ensuring that no important request is overlooked.

While the other options touch upon related functionalities in Smartsheet, they don't directly align with the distinctive role of row action indicators. For example, the creation of new tasks is managed through the task features of Smartsheet rather than through these visual notifications. Linking to external email services is more about integrating communication tools, and showing historical changes in the sheet pertains to versioning and auditing features rather than immediate notification of pending actions. Thus, the correct answer underscores the essential role that row action indicators play in workflow management within a project setting.