The french and indian war

began in the colonies in the year 1754 and ended in the year 1763 in the colonies,the main reason for conflict between the french and colonists was over the Ohio river valley.After this war the english began the practice of --
----- troops at the expense of the colonists ,which later resulted in the third Amendement to the Constitution.

my answer: trade

I disagree. What are your other choices?

I don't know can you help me please if you know?

Do you think the answer the practice of tax is the answer

Take a look at the 3rd Amendment.

http://en.wikipedia.org/wiki/Third_Amendment_to_the_United_States_Constitution

Quartering Acts

Right!

After this war the english began the practice of QUARTERING troops at the expense of the colonists . . .

The Americans considered the protection given by English troops to them at the expense of the English an "entitlement" to which they were entitled :)