The figure of speech used is imagery
A is not an example or a narrative writing.
Well a body paragraph is just like YOUR body it's just located below the head and above the waist and without it you wouldn't survive. The body is basicly the dicription of your topic sentence, whatever you know (or find out) about your topic sentence belongs in the body paragraph.
My standard would be based on how it affected those it need, how accessible the invention/charity/etc was, and how they plan to grow in the future. Hope this helps!