Purpose
When it's your throw-in in the centre third, there are specific set plays you can run. Whoever throws-in depends on whether you want to take the pass quickly, who has the best passing ability in the proximity, and whether you want to keep the front-court open or have more passing options. This particular strategy is used when the ball goes out attacking side of centre and you want more passing options down-court rather than clear-out for the goalies.