To shortly answer your question, an ethic community is a community of people who relate to each other in terms of culture, traditions, and overall ethnicities. An example of an ethnic community (I am speaking on myself) would be Juneteenth. In no way do I mean offense, it is just a mere example. If you need better understanding, let me know and I will gladly assist you.
It would be D) carbon dioxide (I took the test haha).
Answer:
1.impersonation is a form of cheating whereby a different person that the student assigned to the exam or test does it on his or her behalf .