What is a key part of global trade today that allows for growth and diversity?

Trade is so-called the index of an economy. The metric of this trade is called an idea of integration.

Explanation:

Over some time, the trade has grown remarkably in the last two or three decades. It completely changes the global economy. Now, these days in the world around one-fourth of the total production has been exported.

The trade has gained because of the trans-formative process that is very important. If we see from the perspectives of history it is trendy in two waves of globalization. The trade has been taking goods and services together.