What am I?
>! wheat of cheat

I am a 5 letters word.
>!Both wheat and cheat contain 5 letters.

If you remove the first letter I am a form of energy.
>!Heat

Remove two and I'm needed to live.
>! You need to eat to survive.

Scramble the last 3 and you can drink me down.
>!You can drink tea which is eat scrambled.