u/Usual-Plankton9515

Why subjunctive in this sentence?

In response to a Duolingo story question, I wrote the following:

“El ruido en la cocina ocurrió porque Óscar dejó la ventana abierta y el viento hizo que una de las pinturas de Óscar cayera de la pared.”

In the last line, as I typed “cay,” intending to write “cayó,” autofill offered the word “cayera.” I used it instead, and my response was marked correct. But I’m not sure why the subjunctive would be used here instead of past indicative, since the painting actually did fall off the wall.

In response to a story question, I wrote the following:

“El ruido en la cocina ocurrió porque Óscar dejó la ventana abierta y el viento hizo que una de las pinturas de Óscar cayera de la pared.”

In the last line, as I typed “cay,” intending to write “cayó,” autofill offered the word “cayera.” I used it instead, and my response was marked correct. But I’m not sure why the subjunctive would be used here instead of past indicative, since the painting actually did fall off the wall.