A economic trade barrier has something to do with the price of goods for example a tariff, but on the other hand a physical trade barrier blocks something like an embargo or blockade.
A natural trade barrier is something that prevents trade that is not artificially created.
yes it is a non tariff barrier of trade.
quota
One type of trade barrier would be like bieng on a island there is really only one way to get to you so its kinda of a trade barrier i think hope this helps you
a physical barrier is something that stops u from emigrating 4 example large bodies of water etc.
Trade Barrier
physical
BARRIER - a blocking or physical interposition (e.g. "moisture barrier""Great Barrier Reef")
An intact epidermis constitutes a physical barrier.
a monster
A tariff