What term is used to describe the blooming parts of plants?

The term used to describe the blooming parts of plants is "flowers." Flowers are the reproductive structures of flowering plants, also known as angiosperms. Their primary function is to facilitate reproduction, usually through processes such as pollination and fertilization. Flowers are often brightly colored and fragrant to attract pollinators like bees, birds, and other insects, which assist in the reproductive process.

In addition to reproduction, flowers contain the essential parts for producing seeds and fruits. The petals, which are the often colorful parts of the flower, help to attract pollinators, while the stamens and pistils are the male and female reproductive organs, respectively.

While the other options provided are important parts of plants—roots anchor the plant and absorb nutrients, leaves are primarily responsible for photosynthesis, and stems support and transport water and nutrients—none of these directly represents the blooming structures that facilitate reproduction, making "flowers" the correct term.