How do you know if a flower is alive or dead?

A flower is typically considered alive if it has vibrant color, fresh petals, and a firm stem, indicating it is still receiving nutrients and water. Signs of a dead flower include wilted or brown petals, a limp stem, and a lack of fragrance. Additionally, if the flower is dry and crumbles easily when touched, it is likely dead. Checking for any signs of mold or decay can also help determine its state.