At the terminus, all the passengers on the train will have to ________
Answer Details
The word that best fits in the blank is "alight". This means that the passengers will have to exit or get off the train, typically at the final stop or terminus. The other options are similar in meaning but may not be the best fit in this particular sentence. "Disembark" is commonly used for leaving ships or planes, "descend" is typically used for moving downwards, and "dismount" is commonly used for getting off a horse or bike.