The agreement to create a free trade zone between the united states, canada, and mexico is called

The agreement was NAFTA (North American Free Trade Agreement)

Explanation:

It removed many of the tariffs that were affecting trades between Canada, Mexico, and the US.  

this defines the ability for a flex item to grow if necessary. it accepts a unitless value that serves as a proportion. it dictates what amount of the available space inside the flex container the item should take up.

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