Ответ:
A through train is convenient because it allows passengers to travel directly to their destination without having to change trains, eliminating the need to transfer between platforms or stations and reducing the risk of missed connections. This can save time, reduce stress and make the journey more comfortable. It is also beneficial for those with mobility issues or heavy luggage.

Объяснение:
Могу только так. Вы просто не указали класс, страницу, упражнение и т.д.

Если что-то не так, отправляйте жалобу и пусть удаляют мое сообщение, я не против.