Which country do cities of Perth, Adelade & Brisbane belong to?
The cities of Perth, Adelaide, and Brisbane belong to Australia. Perth is the capital city of Western Australia, Adelaide is the capital city of South Australia, and Brisbane is the capital city of Queensland. Australia is a country located in the southern hemisphere and is the world's sixth-largest country by total area. Each of these cities is significant in its respective state and contributes to Australia's cultural, economic, and social fabric.