Final answer:
Cooperation is the social interaction where two or more persons work together toward a common end, which is crucial for social cohesion and mutual success.
Step-by-step explanation:
The form of social interaction wherein two or more persons work together to gain a common end is known as cooperation. Cooperation is a fundamental aspect of social interaction that allows individuals to work together effectively and is essential for the survival and success of communities. In cooperation, individuals may form partnerships, as seen in general partnerships in business, but the concept also extends to social relationships and efforts within communities. Mutual support and organic solidarity are outcomes that arise from cooperative relationships, enhancing social cohesion and fostering mutual interdependence through specialization of work.