The answer would be Agriculture
I know this because I have had a test with same question and it was correct
Hope it helps
I would say a since they don't have income except social security.
More grain was produced elsewhere as well as the fact that increasingly more grain was produced around the same demand of grain.
One of <em>the main factors for the success of the United States in its conflict with Great Britain</em> was that <em>the English men were busy with the war against France</em>. They tried their best to keep the Americans back, while they were fighting against the French. After the Americans won some final battles, Great Britain and the United States of America signed for peace between them. <em>The winning of the final battles by the Americans were another factor for their success against the British</em>.
They found fertile soil, which they used to grow a variety of crops.
They found the soil unusable, and they had to rely on fishing and hunting for food.
They discovered sandy soil, which they had to convert to grassland in order to grow crops.
They shared their knowledge of crop rotation with Native Americans in order to establish trade.
