on Fiction University:
The act two choice is a pivotal moment in your novel, and the wrong choice could send your middle in the wrong direction.
It’s far too easy to know what happens at the end of act one and just plow on forward into act two without really thinking about how the protagonist got there. Did they choose it, or were they dragged along?
Most writing advice and structures combine the act one problem (whatever name it’s called, as it has several) and the act two choice, but I find it more helpful to think of them as two separate moments. This is the first major plot point where the protagonist needs to choose to move forward. So it seems only logical to pay attention to what that choice is.