Given the fact "An example of a reproductive behavior is salmon returning to their birthplace to lay their eggs", what is the answer to the question or completion "if a salmon visits the site of its birth, what could be the reason for that?"

Options:
(I). it is coming to have its own offspring.
(II). it is coming home to die.
(III). it is coming to see its father.
(IV). it is coming to visit its mom.
(I).