Final answer:
The subject of this question is Home Economics, and it asks about the items that can be found on a bed. The question provides different options representing different combinations of items.
Step-by-step explanation:
The subject of this question is Home Economics. The question is asking about the contents of a bed, specifically what items can be found on it. The options provided include different combinations of mattresses, sheets, duvets, comforters, blankets, pillows, and pillow cases. Each option represents a different set of items that can be found on a bed. For example, option a) includes a mattress, mattress topper, sheets, duvet cover, comforter, pillows, pillow protector, and pillow case.