What is the purpose of extra time in a netball match?

Extra time in a netball match serves the primary purpose of extending play when the scores are tied at the end of regulation time. This situation arises during knockout games or finals where a clear winner must be determined. The additional period allows both teams the opportunity to compete further and ultimately resolves the match by ensuring one team scores more points than the other in the extra time allotted.

In contrast, the other options focus on aspects that do not capture the essential function of extra time. Player substitutions occur throughout the match without needing the extra time format. Additional practice is not organized during the match, as the focus is on competitive play rather than training. Finally, changing team positions aligns more with player strategy and rotation during the game itself, rather than the specific context of what extra time is intended to address.