Shade or Grace?

A tree and a flower were arguing one day
About who was better.

"I am better than you."
said the tree.
"I am strong and immovable.
I give shade to people and shelter to animals
This is why I am better."

The flower shook her head.
"I am better than you.
I am slender and graceful.
I can brighten a dull room and bring a smile to a face
This is why I am better."

Neither saw the person drop the cigarette
Or the flames that licked the sky.

The spot where they once stood
Is bare now.

Who is better?