I am a word of five letters!
people eat me!
if u remove my 1 letter i will be a
from of
energy.
if u remove my first 2 letters i will
be needed
for living.
if u remove my first 3letters i will
be a
preposition .
if u remove my first 4 leters i will
be a drink
for you..

 What Am I ?


Answer: Wheat