"The cat is an animal."
Translation:La gatta è un animale.
FWIW, while nouns don't necessarily have a gender in English, that is not always true for animals. A rooster is male, a hen is female, a chicken could be either. A dog maybe either but a ❤❤❤❤❤ is a female dog. A males ass is a jack, while a female is a jenny. Bull, buck, sow, doe, drone, goose, mare, stallion, etc.
It should accept both la gatta and il gatto. I think a lot of people make a different mistake like using una or misspelling animale. But it may just be wrong. This question gets a huge number of comments. The multiple choice answers include "il gatto è una animale" and "il gatto è il animale" which are both wrong making the "la gatta" answer the only correct answer.