What is the plot of the movie australia?

With the globe on the brink of World War II, Lady Sarah Ashley (Nicole Kidman) travels from Britain to Australia to inspect a cattle ranch she inherited. Reluctantly joining forces with a rugged local known as the Drover (Hugh Jackman), she sets out on a cattle drive across hundreds of miles of harsh terrain to save her ranch. But when they finally reach the town of Darwin, they must contend with the same Japanese bombers that just rained death upon Pearl Harbor.

the passage can be best described as: "the british legislature extended an unwarranted jurisdiction".

we can say that because the text clearly states how the people of the colonies warned the british about their excessive desire to rule over them, without taking into consideration the difficulties their brothers had experienced in america: they struggled to establish the colonies, to adapt to new types of weather, fight with the natives, etc., and how they now see (or then saw) the only way out was to cut all ties with the british, since they ignored the people's petitions.