The answer to the question above is "experienced a loss condition" which the situation that Louis will face if he decided to make another gadget. The net income or loss is the difference between cost and benefit of a project or a business. A loss will occur if the cost is higher than the benefit in a business or a project.
Well if you mean what does the controlled part of a scientific investigation, it is the part of the investigation that will be your control or your base, untouched, original, data and such.
Answer: There is no delta at the mouth of the Hudson River because it has a short history of erosion, which means it does not have a delta as there is no sediment to be deposited.
