Answer:
In cultural anthropology and sociology, reciprocity is a way of defining people's informal exchange of goods and labour; that is, people's informal economic systems. It is the basis of most non-market economies. Since virtually all humans live in some kind of society and have at least a few possessions, reciprocity is common to every culture
Explanation:
Through the umblical cord
Answer:
I would say Option B
Explanation:
A controlled experiment is where you have two or more independent variables, that way you have an experiment to compare results with.
I AM CONFUSED?!!!!!!!!!!!!!!