Answer:
What is it called when a cat wins a dog show?
Sometimes dark and sometimes bright, I make my way among twinkling lights. Seas and oceans obey my call, yet mountains I cannot move at all. What am I?
I have a straight back and sharp teeth to cut objects.
By myself, I'm practically nothing. Worthless as a leader, but when I follow a group, their strength increases tenfold. What am I?
I row quickly with four oars but never comes out from under my own roof.
A little house full of meat, no door to go in and eat.