B I think. Hope it's correct.
Ossification is the correct answer
The ear is made up of 3 parts: the outer, middle and the inner ear all these parts are very important for detecting sound by working together.
Answer: The task of a case worker is to assist parents in providing children with a safe environment, far medical care, physiological/ counselling. This is all to make sure children are treated with the most respect and fairness as everyone else.
Explanation: This is all to make sure children are treated with the most respect and fairness as everyone else. Case workers are specially trained to detect when children are being abused or need medical help. They however may not prescribe pills.