The norm of reciprocity is the well accepted social standard dictating that we should treat other people as they treat us.
The norm of reciprocity dictates that we have to give people the same treatment that we receive from them. This norm states that we have to pay people in kind.
The theory tries to teach that people would want to be nicer to others if they are to be repaid back with benefits for benefits.
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Which one are you asking about exactly?
The correct answer to this open question is the following.
You forgot to include the options of the question, we can say the following.
The four characteristics of the Black Prarie region are the following. Several of Mississippi’s major cities are located there. Cattle and dairy farming are important to its economy. It is part of the Appalachian foothills. The plantation system was very successful there. It is home to several well-known rock and blues musicians.
The Black Praire can be found in the Northeastern part of the state of Mississippi to the central part of the state of Alabama. Its name comes from the dark and fertile soil of the region, that allow god crops for farmers. It is a place full of insects, birds, and plants.
The answer to your question, would be that the result of landlords not maintaining their tenements got injured because they were in unsafe living spaces.