Answer: A. Herbaceous
Step-by-step explanation:
A sunflower is an herbaceous plant because a herbaceous plant is the one which does not posses woody parts. The stems of the herbaceous plants remain soft and green. The herbaceous plants grow fast and also produces many flowers and seeds in a very short time. The word herb in the herbaceous plants denote the plant which can be used for producing perfumes, oils and medicines. The seeds of the sunflower are commonly used for the production of oil.