What are the differences between a false start, offsides, and encroachment in football?

Answer 1

A false start occurs when an offensive player moves before the ball is snapped, resulting in a penalty. Offsides happens when a defensive player crosses the line of scrimmage before the ball is snapped, also resulting in a penalty. Encroachment is when a defensive player makes contact with an offensive player before the ball is snapped, leading to a penalty as well.