Answer:
I am a five letter word. If you remove my first letter I am a form of energy. Remove my first two and I am needed to live. Scramble the last three and you can drink me. What am I?
With three leaves, I am just a plant. Add another leaf and everyone will want me for good luck. What am I?
Weight in my belly trees on my back nails in my ribs feet I do lack.
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. What am I?
The most famous dinner
Give it food and it will live, give it water and it will die.