Brassica oleracea is the scientific name for the species that includes several vegetables including cauliflower. While the same species also includes broccoli, cabbage, and kale (different cultivars), in this context cauliflower is the correct answer. The other options are different vegetables: okra (Abelmoschus esculentus), eggplant (Solanum melongena), and tomato (Solanum lycopersicum).