fall into

US /fɔːl ˈɪntuː/
UK /fɔːl ˈɪntuː/
"fall into" picture
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.