"She found her cabin still dry, but as she rummaged about, she heard a key turn and suddenly realized the steward was locking the stateroom door to prevent looting."
The main thing in this excerpt is "to prevent looting."
The theme which the excerpt best supports is the following one:
B. It is important to be grateful.
The character is aware of how terrible his current situation is. However, things could be worse. After all, he didn't drown like the rest of the crew, whose lives ended and cannot in any way carry on. Even though the narrator is in a desolate place, "void of all hope of recovery", there might be a chance for him to find a way out, even if it takes years.
My hero is always the person that Is by my side and never gives up on me. My hero believes in me when I don't believe in myself and that is why that person is... He has always been there for me, he never leaves my side even when I'm wrong or when I'm right.