Correct option is B
Ethylene is a plant hormone that plays a crucial role in the ripening process of fruits. When immature green fruits are treated with ethylene, it triggers a series of biochemical and physiological changes that lead to the development of desirable flavor, quality, color, and palatability, transforming the fruit from its immature state to a mature and edible one. This process is commonly employed in the food industry to enhance the ripening of fruits such as bananas, tomatoes, and avocados.