Why does each trick explained in “cool eye tricks" end with a section entitled “what happened? "
this part of the text provides readers with an unexpected twist or surprise, which only
works at the end of each passage.
it is only after the steps for completing each trick are laid out that readers are ready to
understand why the trick works.
because the details of the tricks are explained in steps by order of importance, the
"what happened? " section reveals the least important details.
each trick is explained spatially, and the “what happened? " section describes each
trick based on what the writer observes last.

a compare and contrast essay is a piece of formal writing in which the author focus on the similarities between two ideas, objects, places, etc., and the differences between them. there are some aspects that the author should take into account when he/she is crafting the essay. first, the author has a clear idea of the effect that he/she wants to produce on the audience (a purpose). his/her main idea should be presented in the thesis statement in a simple but effective way which gives the audience a clear idea of the content and the direction of the essay. in addition, it is also important to focus to the similarities and differences that not only are interesting and relevant to the reader but also provide a new, impressive point of view or deeper understanding of a topic.