needs — of necessity; necessarily (usually preceded or followed by must): It must needs be so. It needs must be.
causes — a person or thing that acts, happens, or exists in such a way that some specific thing happens as a result; the producer of an effect: You have been the cause of much anxiety. What was the cause of the accident?
occasions — a particular time, especially as marked by certain circumstances or occurrences: They met on three occasions.
