Final answer:
Cardiovascular disease is the leading cause of morbidity and mortality worldwide.
Step-by-step explanation:
The leading cause of morbidity and mortality worldwide is cardiovascular disease. It refers to a class of diseases that involve the heart or blood vessels, such as coronary artery disease and stroke. Cardiovascular disease is responsible for the most deaths globally, with risk factors including smoking, obesity, diabetes, high blood cholesterol, and lack of exercise.