Answer:
Who keeps the ocean clean?
I help you carry your books.
My voice is tender, my waist is slender and I'm often invited to play. Yet wherever I go, I must take my bow or else I have nothing to say. What am I?
Men seize me from my home tear apart my flesh drink the sweet blood then cast my skin aside.
Break me and I am better, immediately set and harder to be broken again. What am I?
Said to have fifty shades