Toy Story is fantasy because the characters (toys) in the show act as sentient, which is decidedly not reality. So, no, these questions should not be closed as they are on-topic.
In reference to your edit, Toy Story does cover a key point in the answer you referenced:
Their speaking was somehow fantastical to the other characters.
The talking rats in Ratatouille would certainly fall into the latter category. There's no specific evidence of how they became intelligent but it's clear from the scenes in the film that animal sentience certainly isn't a normal feature of that universe.
Given that they go to lengths to hide their sentience from humans, I would argue that their speaking would be fantastical to the other (human) characters.
Regardless, such a question about Toy Story should deal with the fantastical elements of the story to be on-topic.