Final answer:
An individual with no social ties in a network is called an Isolate, and one that connects separate cliques but doesn't belong to any is called a Liaison.
Step-by-step explanation:
An individual with few or no links to others in a social network is called an Isolate, and an individual who interacts with two or more adolescents in cliques but is not part of any is called a Liaison. Therefore, the answer to the question is a) Isolate; Liaison. Isolates are typically disconnected from strong social ties in a given network, making them less likely to be influenced by group norms or activity. On the other hand, liaisons serve an important bridge role in social networks, connecting different cliques without belonging to any single clique, often facilitating information and cultural exchange between groups.