Final answer:
The central idea of the text is that having friendships and being part of a community are essential to long-term health. This is exemplified by studies showing that social connectedness reduces mortality rates and has health benefits comparable to quitting smoking and staying active. The text highlights the role of proximity in forming relationships and the decline in community engagement.
Step-by-step explanation:
The statement that best describes the central idea of the text is C. Having friendships and being a part of a community are a vital part of long-term health that are often overlooked as a type of healthful living habit. This is supported by the research cited, indicating that social connectedness can significantly reduce mortality rates and is as important for health outcomes as quitting smoking or physical activity. The text references studies that underscore the impact of social relationships on health, including the classic study in Alameda County and the review of 148 studies by Holt-Lunstad, Smith, & Layton, which concluded a 50% increase in survival rates for those with strong social ties.
Additionally, the text elaborates on the importance of proximity in forming relationships, the notion of social connectedness and support in positive aging, and the high value Aristotle placed on friendships in a flourishing life. It also touches upon the concept of social capital and the decline of community engagement in recent times as discussed in Robert Putnam's 'Bowling Alone.'