I’m quite unsure to be honest but I think it’s Social Anxiety.
In the early 20th century the US was the largest agricultural producer
The answer to this question is Prototype.
This concept could take form in all field of technology. Prototype exist after several trial and error that being done in order to perfecting that concept. Companies or researchers usually use the prototype to in order to find a final glitch/bug in a certain concept before releasing to the masses.
a breach in the contract -C.-court of appeals case