Progressive (in a social/political context):

Explanation:

Progressivism is a political philosophy in support of social reform. ... In the 21st century, a movement that identifies as progressive is "a social or political movement that aims to represent the interests of ordinary people through political change and the support of government actions".

"solitude is an inner concept rather than an outward one" is the statement among the choices given that  would be included in a summary of paragraph one of society and solitude. the correct option among all the options that are given in the question is the third option or option "c". i hope the answer you.