Which of the following plant hormone is responsible for ripening of fruits?

The plant hormone that is responsible for ripening of fruits is ethylene. Ethylene is a gaseous hormone that is naturally produced by plants, including fruits, during their growth and development. It is released in higher amounts as the fruit reaches maturity and signals the fruit to begin the ripening process. The ripening process includes changes in the color, texture, and flavor of the fruit, as well as the breakdown of starches and other complex molecules into simple sugars. Ethylene helps to activate enzymes in the fruit that are responsible for these changes, which leads to the softening of