What is a key function of Vitamin D?

Vitamin D plays a crucial role in maintaining normal bone growth and development, which is why it is considered the correct answer. It facilitates the absorption of calcium and phosphorus in the intestines, which are essential minerals for the formation and maintenance of strong bones. Additionally, vitamin D influences bone remodeling by promoting osteoblast activity (cells responsible for bone formation) and inhibiting osteoclast activity (cells that break down bone tissue). Without adequate vitamin D, bones can become brittle or malformed, leading to conditions such as rickets in children and osteomalacia in adults. This highlights the significance of vitamin D in the skeletal system, emphasizing its key function in bone health.