Read the lines.

so fair art thou, my bonnie lass,
so deep in luve am i;
and i will luve thee still, my dear,
'till a' the seas gang dry.

which explains how rhythm is created in the lines?

a.) the speakers description of the seas drying up
b.) the rhythm of i and dry
c.) the use of hyperbole in the stanza
d.) the number of words in each line of the stanza