Which of these has been a major development in global trade since the 1990s?

Which of what? I’m at a loss

Since the 1990s , trade has grown very fast driven by a mix of technological change and policy reforms . With the exception of 2009 trade growth has still remained positive and much bigger than economic growth . This underlined clearly that trade is effective engine for growth.

Hope this helps !

Have a great day!

It's lithogenous i believe of course i looked it up.

The enviroment with hedge hogs