One problem is by trading by sea, ships are bring invaise sea creatures to other countries and can harm the wild life for other marine ecosystems and for tons of people.
I don't think it should be taken at face value because those ways could be the main ways to earn money, but it could probably be the least reliable or successful ways. This sentence could just be a lie taken literaly in which has a hidden meaning. This could be a meaning that you might not get, in which will leave you ripped off.
4 the Spanish galleons because the Spanish galleons was large ships that carried treasure
Lack of mineral resources has forced Japan to become a trading nation.
The ancient civilization is the Indus valleyy<span />
