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—kookabur ras. 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.

in what story are we looking at?

onto a large boat, and mark the water level that the boat sinks to. then, take the elephant out and put a bunch of marked weights onto the boat until it reaches the same water level. add up the masses of the weights to get the weight of the elephant.