How A President Leaves Office - The Only Possibilities
1. The President Resigns - That possibility is always open. Few have made that choice. Nixon did.
By "few," you mean "one."
2. The President Gets Impeached and Removed - The House impeaches; the Senate removes the President. Also rare.
By "rare" you mean "never."
3. The President Dies - This has happened several times in history.
This one you actually got correct.
4. The President Becomes Incapacitated - The 25th Amendment covers this, along with the process of replacement.
Yes and no. Amendment XXV does provide for putting someone in the position of Acting President, but it doesn't actually remove the current President from office. The Amendment actually only provides for a substitute, not really a removal from office
per se.5. The President Gets Raptured - Same as dying. Hasn't ever happened. Won't ever happen.
You don't actually know that this will never happen, but regardless, in the event of a Rapture, the President will most certainly be the very
least of your worries.
6. The President's Term in Office Ends - After two terms, there is no option. After one, he could not run or lose. This is the most common way a President leaves office.
Actually essentially correct.