Ethnocentrism is the tendency to assume that one's own culture and way of life represent the norm or are superior to all others. in this way, ethnocentrism fosters cohesion in a group. this observation would best reflect which sociological perspective?

The answer is "functionalist perspective".

According to the functionalist perspective of sociology, every part of society is related and adds to society's soundness and working in general.  

Functionalists trust that society is held together by social accord, in which individuals from the general public concur upon, and cooperate to accomplish, what is best for society in general.  

Functionalism does not urge individuals to play a functioning job in changing their social condition, notwithstanding when such change may profit them.

the lake is the bhopal lake