No it is not, it should be : Marie has stolen my heart. Hope this helps! : )
The prompt will always say, "WRITE an essay explaining�"
You will elaborate on the prompt a little however, the thesis is just the main idea. If the prompt is not as direct as "WRITE an essay explaining�" just know that the thesis is the main point of your essay.
They create and add suspense throughout the story, making the rising action mysterious and different so that once you hit the climax, what you thought was going to happen is completely different than what did