Answer :
The reciprocity norm is the expectation that those who provide help will receive help in the future
Reciprocity is the process of exchanging goods and services with others for mutual benefit. The reciprocity norm (also known as the reciprocity rule) is a social norm. The reciprocity norm is a human interaction rule that states that people must reciprocate the actions of others. Simply put, when one person receives a gift (which can take many forms) from another, the person must repay the gift. Every studied society has its own version of the reciprocity norm. The reciprocity norm requires us to repay in kind what another has done for us. It can be defined as the expectation that people will reciprocate favourably by returning benefits for benefits and reacting indifferently or hostilely to harms.
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