Answer:
Pavlov's theory of stimulus substitution is the combination of several techniques that are called the spectrum of the umbrella in classical conditioning. It occurs with the pairing with the new stimulus to the already conditioned stimulus. When this procedure occurs new stimulus paired with the conditioned stimulus, there are chances of replacing already conditioned stimulus with a new stimulus.
We can take an example of a rat that is to be conditioned to respond to a whistle which related to fed then can add a flashlight as a signal with a whistle. When light is there then rat fed. The light signal is then substituted part of the whistle.
I think it changes for when the southern people get most of their delegates or maybe when there's most issues going on in the houses of representatives.
The location of Rome helped its economy grow by the fertile farmland that supported crop production.
