How do we get heart disease?

I am doing a project in school about heart disease and i need to get answers on these questions: how do you get it? how do you prevent it?And how do you get rid of it?

The major causes of heart disease today are
1 Hereditary
2 Diabetes
3 Hypertension- esp. if uncontrolled
4 High cholesterol

The major cause of heart disease today is considered hereditary. Everyone's arteries begin to harden by age 45 and up, but those prone to heart disease usually harden up sooner. When hard, they are able to trap cholesteral to the point it masses in one area and you'll have blockage preventing blood from getting to the heart. Hence, unless the blockage is removed the heart will be cut off from blood and oxygen and your heart will die.(Heart attack) For those who have it, there's nothing you can do to prevent it. You can only live a healthy lifestyle(good foods and exercise) and maintain proper weight.
JAMA
you can get heart disease passed down from your relatives. If there is a history of heart disease in the family you have a good change of inheriting it. Bad eating habits when you get older also play a big factor on heart disease. You can prevent it by seeing a doctor and them keeping an eye on your heart, and certain blood test, and other cardiac testing, and once you have been diagnosed with it there is no way of getting rid of it.
You could have heart disease by eating too much.Or have diabetes if you eat too much.
LOTS OF COUSES,IF WE EAT LOTS OF OILY AND SPICY THINGS,SOMETIMES BLOOD GET THICK WITH ANYCOUSE THEN ITS DISTURB UR HEART, AND LAKE OF EXCERSISE.