Question

a deficiency of ______ contributes to the development of osteomalacia and osteoporosis. multiple choice vitamin e vitamin k vitamin a vitamin d

Explanation:

Vitamin D is crucial for calcium absorption. Osteomalacia (softening of bones in adults) and osteoporosis (weakening of bones) occur when there's insufficient vitamin D, leading to poor calcium uptake and bone mineralization issues. Vitamin E is an antioxidant, vitamin K is for blood - clotting and some bone - related proteins (but not the main cause here), and vitamin A is for vision, immune function, etc.

Answer:

vitamin D