Answer:
The scenario described by the question represents an increase in competition - option 3.
Explanation:
There are specific gains from trade. Production possibility curve protrudes outward, symbolizing an increase in the production of output.
Competition becomes more severe, with the occurrence of free trade, this is due to an increase in the variety of goods available to customers. This is so because domestic producers face stiff competition from the foreign market.
Thus, the scenario described by the question represents an increase in competition - option 3.