Answer & Explanation:
During a meticulously planned two-day mountain hike with her classmates, the girl acquired valuable insights. She learned the benefits of maintaining a steady pace rather than rushing, as well as the advantages of sharing essential equipment to lighten backpack loads. The unexpected detour through a forest emphasized the importance of regularly consulting the map and working collaboratively as a team. Additionally, she experienced the unpredictable nature of mountain weather, highlighting the need for preparedness. Despite challenges, completing the hike instilled a profound sense of accomplishment and a newfound appreciation for her own capabilities. (88 words)