Answer:
The imaginary beast that frightens all the boys stands for the primal instinct of savagery that exists within all human beings.
Explanation:
If the food is a plant then it could be immature. This means that it hasn't yet ripened to its prime, and it's not very tasty when eaten.
Inedible is another possible word. Inedible things can be non-food items such as a bed (you can not eat a bed therefore it is "inedible") or food items that aren't cooked or prepared where it is safe to eat, such as raw meat.
Hope this helped!
~Just a girl in love with Shawn Mendes
The second sentence, like the last, provides the context of the situation minus the incoherent word structure so I'd go with that one. Hope this helped,