In an explanatory essay, or any essay, the introductory paragraph introduces (hence it's name) the main idea, or what you are going to explain. The body paragraphs go into extreme detail of what the introductory paragraphs mentioned.
<span>an executive order signed by president Bush in 2001.
</span>
I have no idea can you tell me what you are reading. I’ll tell you as soon as I can if I can get some context clues for it