Select the most appropriate one-word substitution for the given group of words. 

That which falls on the western countries 

Occidental

The most appropriate one-word substitution for "that which falls on the western countries" is western.

• Anecdotal means based on personal accounts rather than facts.
• Occidental means of or relating to the western world.
• Oriental means of or relating to the eastern world.

The word western comes from the Old English word "west," meaning "to the west." Western refers to the western part of the world, especially the Americas. The term is often used to refer to the cultures, customs, and traditions of the western world.