Concept:Relations that exist between individuals are called inter-personal relations.
Explanation:Associations and affiliations are formed when two or more people interact or share common interests.
Such connections between persons are known as inter-personal relations.
Bilateral relations involve two parties, usually countries or groups.
Multilateral relations involve many nations or groups together.
Inter-communal relations occur between different communities, not individuals.
Therefore, the correct option is D.
Answer:D. inter-personal relations