I would think that the answer would be Brainstorming.
As we all know what brainstorming is I'd think that you'd have to brainstorm all your ideas so you can get a better look at what the subject of the essay should and will be about.
Four thousand two hundred ninety-three
The correct answer is option A. Gantt chart. A bar graph that shows what projects or tasks are in process and how much of each is completed is called a Gantt chart. A Gantt chart is a horizontal bar graph that shows the number of work done or completed production in a certain period of time. This production tool is developed by Henry L. Gantt, an American engineer, in 1917.
Because the other two are for introduction paragraph, which is 1st, and last is conclusion.
Hope that this helps!
:)