why australia is the best team in the world?

Because of there fielding, i guess may be they got got a best captain and coach in this world.

because it plays good .

there r plenty of reasons for stating australia the best team in the world. copule of reasons are: commitment, ability to guide team even in risks, all round performance by the players, excellent discipline, sticking to the strengths, excellent fielding, best batting line up, bowlers like brett lee, shane warne, mcgrath, and many other factors which they have in their team.