Good habits are those that help you stay healthy and keep you safe. Washing your hands before you eat is a good habit. Looking both ways before you cross a street is another good habit. Sometimes people learn bad habits. Not wearing a helmet when you ride a bicycle and eating candy and snacks in between meals are some bad habits.
Smoking cigarettes is a bad habit that some people learn.
Smoking is a very hard habit to break because cigarettes are made from the brown leaves of a tobacco plant and tobacco has a drug in it called nicotine. Your body gets used to the nicotine in cigarettes and wants more and more. Cigarettes also have poisons in them. No, but, people who smoke are breathing in all kinds of poisons. These poisons may make a smoker very sick.