Answer:
I am a food with 5 letters. If you remove the first letter I am a form of energy. Remove two and I'm needed to live. Scramble the last 3 and you can drink me down.
What is eaten but can also eat?
I work when I play and play when I work. What am I?
I can be found in water but never wet
What can travel all around the world without leaving its corner?
What never gets any wetter no matter how hard it rains?