fall into
US /fɔːl ˈɪntuː/
UK /fɔːl ˈɪntuː/

1.
to start to be in a particular state or situation, often by chance
:
•
The old house had begun to fall into disrepair.
•
He didn't mean to fall into bad habits.
2.
to be divided into groups or categories
:
•
The books fall into three main categories.
•
His arguments fall into the trap of oversimplification.