Breakdown of Mi hija se agarra a la barandilla cuando el suelo está mojado.
Questions & Answers about Mi hija se agarra a la barandilla cuando el suelo está mojado.
Because agarrarse a is the usual pattern for to hold on to something.
- agarrar algo = to grab something
- agarrarse a algo = to hold on to something / cling to something
So in this sentence, se is part of the verb expression agarrarse a. It shows that the daughter is holding herself onto the railing for support, not just grabbing it briefly.