"The dogs, the cats, and the horses are animals."
Translation:Los perros, los gatos y los caballos son animales.
Los perros, las gatas, y los caballos son animales. < ---- I typed that
But it has this ------- > Los perros, las gatas y los caballos son animales.
In Spanish, the second comma doesn't necessarily need to be there?
In fact, many English learners were taught that the second comma in a sentence like this is NOT necessary --though the textbooks told us to add a comma before an 'and' :P