If you're talking about an essay, it is also called a thesis statement. To write one for and essay: State what you will be talking about in the essay. If you are talking about a story: Use interesting dialouge, an interesting statement, or ask the reader a question.
attention grabber is what will make the reader want to read your essays, or something/sentence that would grab the readers attention
an easy attention grabber is usually doing a question for example; Do You have a hero? this will easily grab the readers attention because they will answer it and keep reading!
The attention grabber
grabber sentences get the readers attention. it makes them want to read more.
This story is awesome!
If you mean grabber as in an attention grabber as in a topic sentence of an essay, here are some good ways: use an interesting quote that has to do with your essay use a short suspenseful story
A thesis statement is a sentence or group of sentences that outline the main purpose of the essay. An attention grabber is the hook to secure a reader's interest in an essay.
first impression is last impression
'Knowledge is Power'.