From the sentence: "During morning meeting, Mr. Rios' students chart the weather," what is missing for parallel structure?

For maintaining parallel structure in a sentence, it is essential that all elements in a list follow the same grammatical form. In this context, if the sentence includes actions performed by Mr. Rios' students during the morning meeting, such as "chart the weather," then all actions should maintain the same format.

Including "discuss" alongside "chart the weather" creates a consistent structure. Both actions are verbs and match in their base form. Without ensuring that all items in the series align grammatically, the sentence can feel disjointed or awkward to the reader. Therefore, inserting "discuss" allows the sentence to flow more smoothly, ensuring that each activity is presented in a parallel format. This harmonious structure enhances clarity and coherence within the writing.