Why is this the answer?

The answer is apple because this fun riddle is describing one of the most popular and healthiest snacks in the world. Let's look at each clue to see how it fits an apple perfectly! The first part of the riddle says, "I'm very tempting, so its said, I have a shiny coat of red." Think about all the bright colors apples come in. While they can be green or yellow, the famous ones we often see in stories and in stores are that deep, shiny red color. That natural polish and beautiful color are certainly tempting, meaning they make you really want to grab one and take a bite! The apple's skin is what forms that bright, colorful "coat" that is mentioned in the riddle. Next, the riddle gives a very important hint: "and my flesh is white beneath." If you have ever cut an apple or taken a big, crisp bite, you know that right under the thin, colorful skin is the main part of the fruit. This inner part, the "flesh," is always a creamy white color, which you can see as soon as you break the skin. So, the red is on the outside, and the white is underneath, which is exactly how an apple looks. This trick with words is a common way riddles work. Then it says, "I smell so sweet, taste good to eat." Apples are famous all over the world for their delicious flavor and fresh scent. From a Granny Smith to a Fuji, they have that wonderful sweetness and satisfying crispness that makes them a perfect snack at any time of day. They are one of the very best parts of a healthy diet. Finally, the last clue is, "and help to guard your teeth." This is a clever way of talking about how healthy apples are for you! Apples are a very crunchy food. When you chew them, the firm, crisp texture and the juices they release actually help to scrub your teeth and clean your gums, almost like a natural toothbrush helping to keep your mouth healthy. They are packed with fiber, which is another great benefit. All of these special details together point straight to the amazing, everyday apple.