It seems you're asking for definitions or explanations related to volleyball terms and concepts. Here’s a brief overview of each term you've listed:
a. Underhand Serve: A type of serve in volleyball where the player strikes the ball with their hand while keeping it below the waist. This serve is generally easier to execute and control, making it often used by beginners.
b. Overhand Serve: A type of serve in which the player throws the ball into the air and strikes it with their hand above their head. This serve is more powerful and is typically used by more experienced players.
c. End Line: The boundary line that marks the end of the court. Players must serve the ball behind this line, and it is also used to determine whether a ball is in or out of play.
d. Setting: A skill in volleyball where one player receives the ball and uses their hands to deliver it to a teammate, typically in a position for a spike. A good set is crucial for effective attacking plays.
e. Passing: The action of receiving the ball and directing it to a teammate. Passing is typically done using the forearms (called a bump) or hands (for a set). It is crucial for establishing an offensive play.
f. Net: The barrier that divides the two sides of the volleyball court. The ball must pass over the net to be in play, and players must not cross the plane of the net while attempting to play the ball.
g. Beach Volleyball: A variation of volleyball played on sand, typically with two players on each team. The rules are similar to indoor volleyball, but the court and playing conditions differ (like the absence of walls and the adjusted scoring system).
h. Standard Volleyball: Generally refers to indoor volleyball played with six players on each team. The game takes place on a rectangular court divided by a high net, and the objective is to score points by grounding the ball on the opponent's side of the court.
i. Ace: A serve that successfully lands in the opponent's court without being touched by them, resulting in a point for the serving team. Aces are often a sign of strong serving skills.
If you're looking for something specific about these terms or their interrelation, feel free to ask!