Answer:
The best answer choice for the question: What characteristics do non-perching birds have in common with tropical birds and owls, would be, A: Hooked beaks.
Explanation:
According to research done, this is probably one of the only commonalities between birds from tropical regions, like parrots, or cockatoos, and non-perching birds like the birds of prey, both diurnal and nocturnal, which are the eagles, owls, hawks, and others. In all of them, what can be found in common is that they tend to have beaks that are shaped hooklike, and are very strong, giving them the capacity to catch strong prey and be efficient hunters.
