How does the EU protect trade for its members?

Question

How does the EU protect trade for its members?

Answer 1

by enforcing draconian measures against anybody who tries to get a slice of the action from outside the EU (ie massive tarriffs and restrictions)

Answer 2

It does not apply strong border taxes as it is member of the WTO.

The EU applies rather free trade agreements with other countries and encourages a reduction of trade barriers around the world.

Answer 3

Give trade priorities to member countries only before trading with others.