The iron curtain was the wall that separated communism from the rest of Europe during the cold war
Answer:
Correct answer is Trade routes were created across the Atlantic Ocean.
Explanation:
First option is not correct as this trade links existed for centuries and were never broken.
Second option is correct as Europeans started sailing across the Atlantic Ocean and reached Americas. With that the process of colonization and trade exchange was established.
Third option is not correct as Europeans (namely Vasco de Gama) discovered sea route to Asia.
Fourth option is also not correct as Pacific Ocean was not yet an area where Europeans were sailing that much and it was hard to established trade links.
