Final answer:
Self-selection refers to the process where individuals choose environments or contexts that align with their needs or personalities, closely related to the concept of socialization and selective migration.
Step-by-step explanation:
The term "self-selection" in the context of social studies refers to a process where individuals choose environments or contexts that align with their needs or personalities. For example, it can refer to choosing a workplace, community, or social network that is compatible with one's preferences and values. This concept is closely related to the idea of socialization, which is the process wherein people come to understand societal norms and expectations, accept society's beliefs, and to be aware of societal values. It is not explicitly mentioned in the provided reference material; however, it can be inferred to be closely related to the concept of selective migration where people move to areas that match their personalities and needs, and it is also linked to the idea that with the advent of social media, individuals can more easily choose their peers based on common interests and beliefs.