It is important to provide a writer with both types of comments because their physical positioning allows you to provide different types of feedback. That is, marginal comments are more suited to feedback on specific sections of the text, while terminal comments are usually saved for more global concerns affecting the whole essay. In other words, your primary concern is reading, not evaluating. You do a great job of explaining hybridization in terms your audience will understand. Asking Questions - the most effective comments to help students revise and develop a critical sense are comments worded as questions.
Questions can refer to content, organization, or even grammar and word choice.
If so, it might be better to make it more explicit for the reader. Although our first tendency as graders is to mark every error we see, this is overwhelming for the writer. It is more helpful to note patterns in organization, or grammar and punctuation mistakes. It is usually best to explain an error the first time it occurs and merely to note its recurrence throughout the paper. Obviously, you can't do this for every error.