Question

Las___________ del año son la primavera, el verano, el otoño y el invierno

Answer 1

The answer is estaciones. Not months because months are January, February, March etc etc. And here is estaciones which are summer, fall, spring and winter. In Spanish is Estaciones——> primavera, verano, otoño e invierno.
So the answer is estaciones. :)

Answer 2

“The (months) of the year are spring, summer, fall/autumn and winter.”

The blank is “meses” (month).