Answer: After surviving those miserable hours in the desert, I learned the value of being prepared.
Step-by-step explanation:
The sentence that would make the best revision of the conclusion will be that "After surviving those miserable hours in the desert, I learned the value of being prepared".
From the story, we can infer the importance of being prepared as the extra food that was packed made them for home safely even though they were lost in the desert for several hours.