Which sentence uses dashes correctly? Uluru is also known as Ayers Rock-it is a large sandstone formation in central Australia. Australia is home to some unusual animals such as kangaroos-wallabies-koalas-kookaburras. Ballaratone is of the centers of the 19th-century Australian gold rush and gold is still being mined-today. Sydney draws visitors from all around the world to see its iconic architectural masterpiece-the Sydney Opera House.

Sydney draws visitors from all around the world to see its iconic architectural masterpiece-the Sydney Opera House.

Explanation:

A dash is a grammatical symbol which consists of a horizontal line located inside of a sentence. It should not be confused with a hyphen, which is used to separate words, such as in the word "e-mail". Among the several functions of a dash there is the emphatic function, in which it can be used to replace colons such as in the example stated here. The version with colons would be the following:

Sydney draws visitors from all around the world to see its iconic architectural masterpiece: the Sydney Opera House.

The last correctly uses dash-Sydney draws visitors from all around the world to see its iconic architectural masterpiece-the Sydney Opera House.

Explain: The Sydney Opera House is the appositive renaming architectural masterpiece.