Answer:
Reaction time
Step-by-step explanation:
You would most likely have to work on improving your reaction time. From the description, it seems like you are having trouble with the speed of the other team's actions. If you are having trouble judging where the volleyball is going to land when the opposing team spikes it to you, you are most likely reacting too slowly. Therefore, you would need to work on your reaction time if you want your skills to improve.