Which of the following digital tools is most appropriate for a teacher to use outside of school hours to provide editing feedback and revision suggestions on students' narrative essay drafts?

While an instant-messaging service can facilitate quick communication, it lacks the functionality for detailed document editing and direct feedback on essay drafts. Teachers would find it challenging to convey comprehensive suggestions or make inline edits through this format, limiting its effectiveness for detailed academic feedback.

Although a blogging platform can be used to share and discuss writing, it is not specifically designed for editing or providing direct feedback on individual documents. The structure of a blog typically focuses on published content rather than interactive revision processes, making it less suitable for personalized feedback on narrative essays.

While a tablet-based writing application can provide some editing tools, it may not support collaborative features as effectively as cloud-based word-processing programs. Additionally, it may require specific software installation or may not be as accessible for all students, limiting its utility for feedback outside of school hours.