The correct identification is:
Greece and Rome are classical civilizations.
The other statements contain inaccuracies:
- Egypt and Indus are considered early civilizations but may not always be categorized as "classical" in the same context as Greece and Rome.
- West Africa and China do have significant historical civilizations, but West Africa is primarily associated with medieval and early modern civilizations rather than classical ones.
- Mesopotamia is considered a river valley civilization, but Greece is not categorized as a river valley civilization; it is considered a classical civilization.
So, the only accurate statement is about Greece and Rome being classical civilizations.