Final answer:
The style is the structure that connects the stigma to the ovary in a flower's reproductive system.
Step-by-step explanation:
The structure that connects the stigma to the ovary in a flower is called the style. The stigma is the part of the female reproductive organ of a flower that receives pollen, which is necessary for fertilization. The style is a long, thin stalk that leads from the sticky stigma to the ovary, which is enclosed in the carpel. Within the ovary, the ovules are found and after fertilization, they will develop into seeds. The entire female organ, including the stigma, style, and ovary, is known as the carpel or pistil, and it's collectively referred to as the gynoecium. On the other hand, the male reproductive organs, called the androecium or stamens, surround the central carpel.