What are the four hash marks on a basketball court for?

My coach has aked my team to write a paragraph one what the four hashmarks on a basketball court are for. Please explain.What are the four hash marks on a basketball court for?
The "hash marks" you are asking about are there for when a player is about to report in for a game. This means that a player needs to check in at the scorer's table and is allowed to come into the game at the next stoppage. Stoppages include: time-outs, fouls, ball goes out of bounds, etc.What are the four hash marks on a basketball court for?
Those hashmarks determine the area of the backcourt (hashmark to midcourt line). In the NBA, a team cannot possess the ball in the backcourt more than 8 consecutive seconds. In other levels of basketball, a team cannot hold the ball in the backcourt for more than 5 seconds, if a defensive player is guarding them within the same area. You'll see some teams' guards hold the ball near the midcourt line in an attempt to run the clock down. As long as the defensive player is standing below the hashmark, and out of the backcourt, the guard can hold the ball as long as he needs to. However, if the defensive player steps forward into the backcourt, then the guard has 5 seconds to get the ball into the frontcourt or pass to another player who is not being guarded.What are the four hash marks on a basketball court for?
Behind the free-throw line there is a semicircle. The top of this semicircle is referred to as the top of the key. Along each side of the lane, there are four hash marks. These are called blocks, and designate spots where players must stand during foul shots.
I believe the hash marks you refer to mark the coaches box. Coaches are not suppose to go past that line or his/her team ca.n be given a penalty