1.Higher production per unit of input gives the absolute advantage which in this case is with US but that does not???? necessarily means that country should specialize in that Product since, for specialization we nwes to look at comparative advantage which takes into account opportunity cost involve with the production of that Product since resources are limited with each country hence it becomes imperative tonknow how many units of other product you will be foregoing for production of one product.

2.Absolute advantage gives you the Output with one unit of input while comparative advantage gives you the amount of unit of other product you will be foregoing for producing those which is more important from the international trade perspective since the resources are limited with each of the nation and one should specialize and produce more of goods where they have comparative advantage and then trade to gain the product where the nation have limited availability this will allow the country to consume more and Increase total value.