Group, compared with a primary group, has a greater number of members whose relationships are more distant; relatively speaking, this kind of group does not last as long as a primary group and is based on some shared pursuit.
O primary
O secondary
O tertiary
O categorical

When discussing comparative and absolute advantage, which best describes specialization? developing expertise in certain types of production limiting the types of goods and services produced targeting specific consumers and retailers producing certain items for specific market segments the answer is: the act of limiting the kinds of goods and services produced

Whether or not a given study has the possibility of causing harm to participants:

Why learning about people and places around is important?