Final answer:
Sarah should have brought a sports drink like Gatorade or more water to stay hydrated during her hike. Glucagon would not help with hydration, as it is involved in glucose metabolism, not fluid replenishment.
Step-by-step explanation:
When hiking in hot climates, like the Everglades in June, it's essential to maintain hydration. Unfortunately, in the given scenario, Sarah did not bring much water, and it's not safe to drink the swamp water. Although glucagon is a hormone that triggers the release of glucose into the bloodstream, it is not something that would help Sarah stay hydrated. In such situations, the best course of action is to carry adequate replenishment of fluids, as exemplified by the invention of Gatorade. Gatorade was designed to replenish fluids, carbohydrates, and electrolytes lost in perspiration, particularly in hot and humid environments.
Given that Sarah is likely to sweat significantly during her hike, bringing a similar sports drink or more water would have been advisable. When hiking, it's crucial to plan and take appropriate safety measures, including carrying enough water — typically 1 gallon per day for intense activities, as mentioned in survival guides.