A ball remains playable when it touches which of the following under specific conditions?

When a ball touches a non-team member who is not interfering with play, it remains playable due to the rules that govern such situations. According to volleyball regulations, if a ball makes contact with a person not directly involved in the match (e.g., a spectator or an official) and that contact does not hinder the ongoing play, the rally can continue. This applies even if the ball hits the non-team member as long as it does not disrupt the flow of the game.

In contrast, if a non-team member interferes with play, it can result in a stoppage or a replay of the rally, as their involvement disrupts the normal flow of the game. Similarly, a team member attempting to play the ball does not ensure the ball remains playable if they do not legally make a contact or if the action results in a fault. Lastly, when a ball hits the net, it is still in play in certain conditions, such as during a serve or if both teams are vying for the ball. However, it isn’t specifically about an outside party or a non-involved person not interfering, and thus does not apply directly to the conditions of this specific question.