<span>someone who watches something </span> Explanation:
To answer this question you need to understand what the word "spectator" means<span>
</span>spectator: person who watches at a show, game, or other event.
The sentence is talking about a new basketball team coming to town, this means they are going to play a game and people enjoy watching it. So without saying anymore you can conclude that "someone who watches something" is the correct answer.