Answer:
I bring light to a dark world. In a current I travel and through tunnels I am hurled. Touch me and I'll kill you. What am I?
I am a mother from a family of eight. Spins around all day despite my weight. Had a ninth sibling before founding out it's fake.
I am bought by the yard but worn by the foot. What am I?
I will disappear every time you say my name. What am I?
The more you take away from me, the bigger I shall get. What am I?
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk