The answer for this question is human society
Answer:
In Ivan Pavlov's famous studies, the food was the unconditioned stimulus, and the salivation was the unconditioned response.
Explanation:
Ivan Pavlov (1849-1936) was a Russian physiologist who conducted studies on behavior conditioning with dogs. In his studies, dogs would learn to associate different stimuli and produce certain responses.
A unconditioned stimulus is something that produces a natural, automatic response. That natural response is called unconditioned response. In Pavlov's studies with the dogs, he would show them food, and the dogs would start salivating because of it. That means the unconditioned stimulus was the food, and the unconditional response was the salivation.
Advantages for whom ? Generally, in a smaller family the resources are distributed among fewer people, which means that the children can get a better education and more support and the parents don't need to work us much (e.g. double shifts) to support their family. For the whole state, a 2+2 model is also the most sustainable, where there are no drastic differences in population age over time:the number of people stays constant if everyone has around 2 children.
