Pronounced as one letter, And written with three, Two letters there are, And two only in me. I'm double, I'm single, I'm black, blue, and gray, I'm read from both ends, And the same either way. What am I?
I am a plant you use in food, and my name consists of 5 letters.
Remove the first letter of my name, and you'll get a form of energy.
Get rid of two, and you'll get something necessary for life.
Scramble together the last 3 letters, and you can drink it.
What am I?