The brain is the seat of consciousness and the brain is material, therefore consciousness is emergent from material. My evidence that the brain is the seat of consciousness is that when my head hurts it impairs my thoughts, and that my eyes are connected to by brain.
Stated a bit differently:
All events must have a cause, therefore consciousness must have a cause. The brain is the most likely candidate for the cause of consciousness. The brain is material, therefore consciousness is emergent from material.
What role do you think the brain plays in consciousness? Do you believe that events must have causes?