The Maya and the Olmecs are Mesoamerican civilizations that were not known to Europe and Africa before Columbus. Han dynasty ruled ich China- so it's not a good option either.
The correct answer is the Kingom of Axum, in today's Ethiopia, which had trade relations with the Roman Empire.
No plastic or metals can be thrown in the trash, only in the recycling bin, even though it would be close to impossible because there’s no way of telling who does it or who doesn’t but it would help stop the waste in the oceans, it’s killing animals and it’s also messing the waters up.
