medea66,

Passage says :
if productivity in a country increases the wages wil increase.
From the last few lines we understand that evewn if wages dont increase productivity increase in developing countires wil cause the appreciation of its currency.
Some countries hav deliberately kept the value of the currency low but that is hard to do anymore cos of internationalization(movement of capital or goods through out the world) .In other words Internationalization is revelaing info to other counties ...

The question ask what if this internationalization dint happen ..
From the above explanation we see that if internationalization dint happen

Counties would not be as transparent as they are.
They can control the appreciation or depreciation of money cos they are not restricted by trade with other counties.

Finally country's productivity can increase even without any increase in value of currency ..

Hope u understand