Answer:
US has a greater labor resource.
Step-by-step explanation:
The US is one of a leading nation in the labor industry. Some reasons perhaps is that the US has a greater population than Canada. It Cant be the last one because Canada is the second largest country. It cant be the 3rd one because canada has A LOT of fresh water up north. the first one and second ones are left. Now, the US has more gold than Canada too. So, it the 2nd one.