Direction: Read the given information and answer the following questions.

Smoking is a major public health concern worldwide, with detrimental effects on nearly every organ of the body. The habit of smoking, primarily involving the inhalation of tobacco smoke, has been linked to a myriad of health problems, ranging from respiratory illnesses to cardiovascular diseases and cancer. Despite widespread awareness of these risks, smoking remains prevalent, particularly among younger demographics.

The primary substance in cigarettes responsible for addiction is nicotine, a highly addictive alkaloid. When inhaled, nicotine rapidly reaches the brain, causing a release of dopamine, which creates pleasurable sensations. This rapid reward system reinforces the habit, making it challenging for smokers to quit. However, nicotine is just one of thousands of chemicals in tobacco smoke, many of which are harmful.