Final answer:
A high degree of dependence and little privacy characterize primary groups, which involve close social relationships with strong emotional ties and a sense of responsibility between members.
Step-by-step explanation:
The type of internal boundary characterized by a high degree of dependence on one another and relatively little privacy is known as a primary group. Primary groups are our 'closer' social circles that involve more complex relationships and closer ties. They often include family and close friends, where there is a strong sense of commitment and emotional depth. In these groups, people often have a high degree of reliance on each other for emotional support, as well as a sense of responsibility towards each other's welfare.
Such relationships, especially with the advent of mobile technology, can sometimes result in issues like overdependence and communication expectations, potentially leading to dissatisfaction. The phenomenon of feeling trapped or obligated to respond instantly in mobile-dependent relationships can lead to pressure and guilt, detracting from the quality of the interactions.
In historical and social contexts, individuals within primary groups, such as those in hunter-gatherer societies or close-knit communities, were expected to adhere to social norms and maintain strong mutual relationships, as survival often depended on it. The intense sharing of space and responsibilities created a social fabric of interdependence, which is a hallmark of primary groups.