The answer is physician. A physician is a practicing doctor. Job, occupation, and profession are all synonyms that do not specify any particular job. Hope this helps.
B. is the correct answer.
The answer is Has some negative effects on humans
Answer:
it supports the central idea which is the main cause of the authors writing or scripting it also affects it so that the people can get to know more about the particular book and makes us know about the central theme or climax