What the body paragraphs of an essay must support the thesis satement?

On an Essay

You are writing the essay on a particular topic. You are not writing a novel where you can go from one point to another when you deal with character development. You are not writing a history where you throw in irrelevant facts. You are not writing about science where you trace interesting facts all over the place. No. You are writing an essay. Now you may be writing an essay on character development. You may be writing an essay on something to do with history. You may be writing an essay on something to do with science. Still. You are writing on a single topic. You are not jumping on your horse and going off in all directions. You are sticking to the topic at hand.

If you are writing about how a character developed during a story, you start with how she was in the beginning. Jane was a frightened farm girl who had never been more than 10 miles from home when she left to take a job as a maid in the big city. She had one dress. She usually wore jeans. ... She got off the bus and saw a gray hair lady with cold piercing eyes.... She started feeling at ease... You show how the frightened girl developed into a charming young lady. That is the point of your essay. Or, you show how a scientist discovered an element or something else.

Some essays use first person. Others don't. An essay is on one topic.