Depends:
verb
1.
be controlled or determined by.
"differences in earnings depended on a wide variety of factors"
synonyms: be contingent on, be conditional on, be dependent on, turn on, pivot on, hinge on, hang on, rest on, be based on, rely on
Theme:
noun
1.
the subject of a talk, piece of writing, exhibition, etc.; a topic.
"the theme of the sermon was reverence"
synonyms: subject, topic, subject matter.
2.
an idea that recurs in or pervades a work of art or literature.
"love and honour are the pivotal themes of the Hornblower books"
