Se chocan
We use “se” because you are referring to a group of passengers. Se is used for “they” when the group is plural or singular third person.
We use “chocan” because they are bumping into other passengers which is plural. Chocan is for plural.
feel free to delete this after, but i dont
see a question
<span>¿Cuál es la palabra para hablar sobre el origen en el tiempo o el espacio?
Desde</span>