Helianthus or sunflowers is a genus of plants comprising about 70 species in the family Asteraceae, all of which are native to North America except three species in South America. It is a genus of ornamental plants. Sunflower seeds are actually cypsela-type fruits meaning that the fruit is dry, doesn't split open at maturity and contains just one seed. The oils are obtained from cypsela fruits. Thus, the correct answer is option A.