What was the most important lasting impact of Alexander’s conquests?

The most important lasting imapct was the spread of Greek culture through the successor empires that long outlasted Alexander's rule.

it allows shippers to carry commercial goods, which allows them to save time and money.

explanation:

an oligopoly is a term used to clarify the structure of a particular market, industry, or organization. a market is considered oligopolistic or amazingly focused when it is shared between a few companies.