Answer: for discrimination
Dragons are legendary creatures in Chinese mythology such add turtles and fish. But I can't find how many there actually are sorry
The one reason is to limit the power of Federal Government.
This division of authority is referred to as "federalism". The <em>Federal government</em> is very strong, with much power over the states, but at the same time, it is limited to the powers enumerated in the constitution. Powers not delegated to the <em>Federal government</em>, nor prohibited to the <em>States</em> are reserved to the states or to the people.