When describing a school trip (رحلة مدرسية), the most appropriate style is الأسلوب القصصي (the narrative style). A school trip is an experience with a sequence of events - departure, arrival, activities, and return - which naturally lends itself to storytelling.
The narrative style allows the writer to recount events in chronological order, describe scenes and observations, and engage the reader by conveying the atmosphere and personal experiences of the trip. This is exactly what descriptive composition about a trip requires.
The interrogative style (أسلوب السؤال) is used for raising questions and inquiry, not for recounting events. The oratorical style (الأسلوب الخطابي) is used for speeches, sermons, and persuasive address to an audience, not for personal narrative. Religious rhyming prose (السجع الديني) is a stylistic device used in religious texts and formal sermons, not appropriate for a casual school trip description.