Parenting

Yes, but it's also important to remember that this is universally recognized because it's a common aspect of preadolescent brains. I know this is just a comic, but I've seen a lot of parents treat it like willful belligerence (and sometimes it might be), but that's not necessarily accurate or constructive. Kids don't choose that their brain makes them prefer certain things and have a visceral aversion to new foods. Some kids can be encouraged to try things and will enjoy them once they've tried them, but some kids just can't do it until their brain is more developed and the disgust reaction to new food dampens.

It's an extreme example, but I've watched my kid try to force himself to eat something because I asked him to try it and he was literally shaking and dry heaving trying to put it in his mouth. IIRC it was a french fry that was shaped differently than the ones he usually eats. Like I said, extreme example, but kid brains are legit wired differently when it comes to food, and that should be respected.