What is a research essay

You do research on a subject and write an essay on it based on the research

Explanation:

Its when you do research on the subject of the essay you're going to make. When you think you've gotten enough research you start your essay with that research :)

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.  

answer; society;