Final answer:
The head of the bed raised at a 30-degree angle is called semi-Fowler's position. This position is often used in medical settings to help improve breathing and prevent aspiration.
Step-by-step explanation:
The head of the bed raised at a 30-degree angle is called b. semi-Fowler's position.
This position is often used in medical settings to help improve breathing and prevent aspiration. It is also used in certain medical procedures and for patient comfort.