If you freeze water it becomes ice. Yet, when melting it reverts to
water. This is change. If you burn a stick of wood, it becomes ashes.
It can never become wood again. This is transformation. Please can you
anyone give me a more inspiring example or analogy for transformation

Cooking an egg or baking a cake.

Kateri

Acorns becoming oak trees. 
A zygote becoming a human being.

Are you just looking for examples of chemical reactions that are
generall irreversable?  I don't believe melting/freezing ice qualifies
as a standard chemical reaction (as it's just adding or removing
energy from existing molecules).  Burning wood, by introducing heat
and oxygen chemically alters the molecular makeup of the compound,
releasing carbion dioxide (from the carbon in the wood + oxygen in the
air) and leaving ash.

One of nature's most startling transformations is when a caterpillar
-- a slow, creeping, wormlike creature -- undergoes metamorphosis, and
emerges as a delicate and beautiful butterfly capable of flight.

The big bang transformed into the known universe. That kinda tops any
other transformation.

Best