If anything gets in the way of our good eating, it’s lifestyle. When you get home from work late, why spend an hour in front of
the stove when you can spend two minutes at the microwave? And doesn’t that oatmeal box claim to be a good source of calcium for our kids, never mind the small print listing 14 grams of sugar? A small soda at the movies could satisfy a family of four. Even schools have vending machines. What would make the author's argument more effective?
offering a reason to support her opinion
providing a quotation from a credible source
recognizing and refuting a counterclaim
motivating readers with a call to action
You have to tell us which words are underlined, but I have a feeling the words were "a popular author of children's books." which is an appositive. Author is the same thing as Shel Silverstein.