Answer:
Okay so a la is the feminine form of the definite article.
So when your gonna going somewhere and the place is femine you use it.
for example: Yo voy A LA casa de mi amigo
your going to the house off your friend house (casa) is femine,
another example:¿ tu vas a ir a la fiesta ?
your going to party?
a la means to but in femine
a el is masculine
Step-by-step explanation: