Subplots often involve ?
a . the main series of events
b . positive transitions in character relationships
c . unimportant details that have no bearing on the main plot
d . secondary characters

the woman's ability to do hard work is by far the best answer.

moon-letters were a method of writing invented by the dwarves. moon-letters were ordinary runes, but written in such a way that they could only be read when the light of the moon shone behind the writing. some moon-letters could be read by any moonlight, but it was possible to make the writing even more secret. more sophisticated moon-letters could only be read by the light of the same shape of moon, or at the same time of year, as when they were written. hope this !