A running list of new vocabulary words is made to help you remember those new words. So, to that aim, a good strategy is include opposites, that relation help to memory.
The other option could be last one, but if all words are related, it can be confusing.
The ancient Babylon (located in west Asia), ancient Egypt (located in north Africa), the ancient India， which is located in the South Asia and China which is located in east Asia.
