This is the 1115th most frequent Spanish word.
animal
A living organism characterized by voluntary movement and sensory perception.
Here, 'animal' is used as a noun to classify a cat within the category of living creatures.
El gato es un animal muy curioso.
The cat is a very curious animal.
In this case, 'animal' is metaphorically describing the lively and energetic mood using qualities associated with animals.
La fiesta tuvo un ambiente animal, lleno de energía y entusiasmo.
The party had an animal-like atmosphere, full of energy and enthusiasm.
'Animales' here refers specifically to farm animals, emphasizing caretaking and context.