Astimulus for which there is no conditioned response is called a(n) stimulus.

A stimulus for which there is no conditioned response is called a unconditioned stimulus. The unconditioned stimulus is a stimulus that naturally and automatically provokes and triggers a behavior or response.During the process of classical conditioning, the neutral stimulus (NS) is converted into the unconditioned stimulus.

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.

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