Answer:
I'm an animal. I love marching. I always wear a tuxedo. What am I?
I cannot be felt seen or touched. Yet I can be found in everybody. My existence is always in debate. Yet I have my own style of music.
I am needed for most animals and hardcover books
I sleep by day, I fly by night. I have no feathers to aid my flight. What am I?
I am round. I have only one line. Circle is not my name indeed. What am I?
Give it food and it will live, give it water and it will die.