are segments of the population whose members have a relatively similar portion of desireable belongings, and who share attitudes, values, and norms?

Social classes

Explanation:

The social classes are a class of people that reside around and whose attitudes are largely dependent on their jobs, status in the society, wealth, education and the way people perceive and do things. So these are the things that constitutes to behavior of a class of person and we judge on this measurement scale. This population who have similar portion of objectives, attittudes, values, norms are a segment of population and known as a social class.

answer; /// i believe that the correct answer is (a) making presentations;

you should think about the answers you give and expect the same form your questions.