Hello. As you have not informed the reading options that this question refers to, it is not possible that this question can be answered accurately. However, I will try to help you in the best possible way.
In order for you to be able to write a thesis statement, you must in a few lines summarize the central point of the text and issue a position on it. An example of this can be seen in a statement and thesis on the book "All the Bright Places" that says: "The book points to family neglect in relation to adolescents' feelings as an aggravation of childhood depression and the negative results that it can to tease."
This advertisements targets your fears
It's basically telling you that you can get cancer from it, so because you're afraid of cancer, you don't want to purchase it.
