Which passage from the article best supports the idea that it can be tough to score points in pickleball?

You hit the ball with a paddle instead of a racket, the ball is plastic and has holes in it (like a wiffleball).
…about 5 million Americans play pickleball regularly in parks, community centers, retirement communities, and as part of leagues.
If your foot—even just a toe—happens to be in the NVZ when you're initiating or returning a volley, that's a fault.
…the first thing you need to know about this invigorating game is that it has absolutely nothing to do with pickles.

If your foot—even just a toe—happens to be in the NVZ when you're initiating or returning a volley, that's a fault.