Because for a long time the United Kingdom owned Australia until Australia decided they wanted to be their own country. If Australia wanted to they could change their flag so it didn't have the British flag in it but as of yet, they have not.
Possibly Great Britains
Great Britain does not have a flag (since Great Britain is the name of an island, not a country). However, the country that occupies that island, the United Kingdom of Great Britain and Northern Ireland, does have a flag. The British Flag's proper name is the Union Flag but some people call it the Union Jack.
Because Australia was colonised by the poms and when we were an established nation that needed a flag, they had the majority of the population and therefore had to have something English in our flag (the union jack) because they introduced trade and modernised our country, etc.
yeah
Cause we used to own Australia and all of the Pacific. In fact, once 1 third of the world was run by the UK
the creepy fat peoples
Stonehenge
The 'Union Jack' has three colours: Red, White and Blue.
Freedom from Great Britains goverment. Now "All peole are created equal." Freedom from Great Britains goverment. Now "All peole are created equal."
Number 5 as of the Olympics
They are chosen by Parliament
a paliamentary system