Final answer:
Social capital is best described as the capacity to achieve tasks with the assistance and support of a network of relationships, which promotes reciprocity and community engagement.
Step-by-step explanation:
The answer is B. It is the capacity to get things done with the support and help of others. Social capital refers to the networks of relationships among people who live and work in a particular society, enabling that society to function effectively. These relationships produce communities with norms of reciprocity, where being well-connected not only benefits individuals personally but creates a networked group that feels obligated to support one another. Notably, social capital is linked to political participation; studies have found that increased social capital leads to more involvement in political processes and community engagement.