Final answer:
Yes, this could be a Sunflower.
Step-by-step explanation:
Yes, this could be a Sunflower. Sunflowers are herbaceous annual plants that can grow over two meters tall with a single large head. The stem of a sunflower can be more than 5 cm in diameter and is remarkably 'woody'. Sunflowers are known for their yellow petals and the large heads that offer seeds to passing birds. They are commonly cultivated as an important crop species.