Apsychologist is studying how a society's shared rules, along with the values, beliefs, and attitudes shared by most members of that community, affect the behavior of individuals. this research could be described as investigating the effect of on behavior.

The correct answer is Culture.

Explanation:

In psychology, culture is a very important subject of study and it's focused mainly on "the study of the way cultural traditions and social practices regulate, express, and transform the human psyche, resulting less in psychic unity for humankind than in ethnic divergences in mind, self, and emotion." As said by Richard Shweder so when we talk about rules, values, beliefs and attitudes of a certain community we are necessarily referring to Culture because of the social practices involve in the things studied by the psychologist in the question.

trade regulation is a field of law, often bracketed with antitrust (as in the phrase “antitrust and trade regulation law”), including government regulation of unfair methods of competition and unfair or deceptive business acts or practices. antitrust law is often considered a subset of trade regulation law. franchise and distribution law, consumer protection law, and advertising law are sometimes considered parts of trade regulation law.

in general the theory of economics says that the more open to trade a country is the better   the result for the same country and the whole economies.

in real life countries impose taxes, quotas, etc which is not so good for the economies.

this kind of commercial war between the usa and china is slowing down the growth of the whole world so we can say that it is a draw back of trade regulations. and the free trade agreements are benefits of trade regulations.

all people shall have equal rights upon birth and ever after. (when referring to the rights of man the declaration of the rights of man only applied to landowning men who were 25 years or older and paid taxes equal to 3 days worth of work and were not servants.

explanation: hope this