One organism benefits while the other is harmed
I believe the answer is: A. human resources.
In current understanding, human resources could be divided into intellectual resources (such as creative thinking or long-term planning) and physical resources (that include manual labor such as operating machines or setting up roofs on a building)<span />
They don't look out for you they do whatever is the best way to earn money.
Specialization refers to the process whereby a country or an individual decide to concentrate on production of limited variety of goods in which he has economic advantage and relies on other countries or individual for getting goods which he can not produce himself.
The advantage of specialization is that people become experts at what they do and produce quality goods. Specialization enable people and countries of the world to interact with one another.
An example of specialization in international trade is the production of cocoa bean which is used to make cocoa beverages by Nigerians. Nigeria cultivate cocoa beans and export it to Japan who supply them with electronic goods. <span />
