Imagine this.. if you were in the middle of 2 fights, you would have weapons coming at you from both directions. If you blocked off one of the armies, it would be easier for you to defend yourself. Also, they could be more aware of an attack is they only have 1 side to worry about. :)
The Ohio River was rich soil and was good for hunting and farming that's why it was important for the French and the British
Answer:
to determine the right format for their content and to determine the best word choices to convey their message