In Isaiah 44, a man burns half a tree for fire. What does he make from the rest?

Answer: A god to worship

Isaiah mocks idolatry: the man roasts meat over half the wood, then makes a god of the rest and prays, "Save me."

“It serves as fuel for man. He takes some of it to warm himself, and he kindles a fire and bakes his bread. He also fashions it into a god and worships it; he makes an idol and bows down to it.”— Isaiah 44:15 (BSB)