They can't breathe through their nose, so they have to breathe through their mouth, and that makes a snoring. Elderly people are said to snore much more than younger people. It's also more common for overweight people to snore. Their tonsils are swollen and that's blocking their air passage. And there are a lot of ways to stop.
Doctors recommend, first of all, losing weight and exercising.
They also say don't drink, as you mentioned earlier, when you drink, you tend to fall asleep and start snoring. In addition, there're dental appliances which are basically like mouth pieces that you wear while you're asleep that sort of push that, back, that soft palate area of your mouth up and lower your jaw somehow and, open the air, basically open the airway so you don't snore. So, you can adjust your sleeping position. I also read about this new sort of high-tech way of stopping snoring which is, uh, it's done by a doctor. They insert some sort of transmitter into your skin back there that emits radio frequencies, and what that does is it causes the, some of the skin on that soft palate to disintegrate and that opens up that air passage.