This is an expository prose.
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.
The Finches have the most power and highest status in Maycomb. Atticus is a lawyer and is one of the most educated men in town. While they are not considered the wealthiest family in town, they are more financially secure than the other two families. The Cunnighams do not have much power and status within the town. They are poor and struggle to make ends meet. However, they are respected in town. They do the best they can with what they have and always settle a debt with some goods or services. The Ewells have the least power and lowest social status. They are extremely poor and uneducated. Mr. Ewell is not respected around town because of the way he abuses alcohol and his family.