Respuesta :

1Knowledge
Whom is the object of a verb (i.e. the one being acted upon). The difference between who and whom is similar to that between he and him, or they and them. He and they are the subjects of verbs, and him and them are objects.
goldenarrow
who is like he because it is used as the subject of a verb

whom is like him because it is used as an object. It is never the subject of a verb 

hope this helps!