If your foot is on the serving line
They have to be behind the serving line, but they can jump past this line when serving.
You are not allowed to cross the end line before the ball leaves your hand. Also, you're not allowed to catch the ball if you make a bad toss. You have to let it drop before the ref issues you a redo.
Its about 30 feet.
It depends what sport you are playing. I know that if you are playing volleyball you have to be behind the serving line which is close to the end line. In badminton you have to be behind the service line also which is usually closer to half court
There is no such thing as fouls in volleyball. Well, a player can get a foot foul, and that is when the players foot touches or crosses serving line. You can get as many of those as you want. There really isn't any fouls in volleyball like there are in basketball
While serving, if the player's foot breaks the line, it is considered a foot fault, and the opposing team is awarded a point.
no
When the person who is serving steps over or on the service line.
the back line C:
The other team automatically gets a point and the ball C:
You use the same service line as any other age. It never changes officially.