The modification that would enhance sentence 7 the most is the one below:
Propose an alternate plan to supersede the existing school calendar. Clarify why it is no longer suitable and inefficient. Share a viewpoint on those who resist making changes to it. Reiterate the most compelling piece of evidence backing the assertion.
Comments: The preceding paragraph includes directions for an academic task or something similar. Given that there were guidelines, it became necessary to convert the verbs from an "ing" format to an imperative form (which is intended for giving orders, commands, or directives). Adjustments to punctuation were also required: several pauses were incorporated, implemented through periods (.). To avoid excessive repetition, it was appropriate to substitute "the existing school calendar" with the pronoun "it" (third person singular) from the second mention onward.
The most appropriate revision of the modifier "badly" in sentence 5 is "bad": She felt bad that someone had lost such a nice watch. The term badly is an adverb, which modifies verbs and other words: badly constructed furniture; she was treated very badly. In this revised sentence, the word bad functions as an adjective after a linking verb "felt."
Response:
Resalta la naturaleza cíclica del año.
Justificación:
Lo que el autor intenta comunicar en el texto no es que cada año sea exactamente igual, sino que, aunque las estaciones hacen que el año sea ligeramente diferente según el periodo, los eventos que suceden son muy similares.
Para ilustrar este punto, el autor equipara lo que ocurre cada estación con las personas, la vegetación y el ciclo día/noche. A pesar de los cambios, en realidad no son tan diferentes y su naturaleza es cíclica.