Final answer:
The time travelers in this scenario are best described as unlucky.
Step-by-step explanation:
In this scenario, the group of time travelers finds themselves in a distant future where nature has taken over and savage animals roam freely. The question asks which word best describes this group, and the correct answer is unlucky. This is because they are unfortunate to have been transported to a future that lacks civilization and is dangerous due to the presence of savage animals. Fortunate would describe time travelers who are able to travel to civilized futures, while successful and courageous are not accurate descriptions based on the information given.