Primary on: actively promoting a particular cause or belief
A major factor is a primary cause, a large reason why something happens.
A faulty head gasket will cause power loss, coolant to mix with oil, and is a costly repair. Excessive heat is the primary cause for their failure.
no it wasn't the primary cause for the Enlightment
The primary cause of the Crusades was for the Christians to win back the "Holy Land."
A primary cause for surface winds on the earth is the Earths Rotation.
Stabbing yourself with a pen can cause pain, bleeding, and potentially an infection if the wound is not properly cleaned and treated. It is important to seek medical attention if the wound is deep or if there are signs of infection.
The primary cause of destruction of ozone layer is CFC's. They react with ozone to deplete it.
The primary cause of urbanization is jobs or the growth of industry. People will move to where they can find work.
cause it is
Drawing on yourself with a pen can cause the ink to seep into your skin, potentially leading to irritation or allergic reactions. Additionally, the ink may be difficult to wash off completely, leaving a temporary or permanent mark on your skin. It is not recommended to draw on yourself with a pen.
Well, I'm not really sure with my answer but I think the primary cause of the stroke is the heart attack and high blood pressure.. :)