When a person studies a particular subject and has employment due to that specific knowledge, it is called: a career
This is further explained below.
Generally, The individual's "journey" through study, employment, and several other elements of life is represented metaphorically by the career.
A career may be defined in a variety of different ways, and the word itself can be used in a number of different contexts.
In conclusion, It is referred to be a professional when an individual pursues education in a certain field and then finds gainful work as a result of that education.
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complete question
When a person studies a particular subject and has employment due to that specific knowledge, it is called:
A. a hobby
B. a career
C. a job