What item is provided for comfort under the head while resting?

The item provided for comfort under the head while resting is a pillow. Pillows are specifically designed to support the head, neck, and sometimes the upper body, making them essential for comfortable sleep or rest. Their shape and filling allow them to conform to the contours of the head and help maintain alignment of the spine, which is important for restful sleep and overall comfort.

While sheets, blankets, and cushions can contribute to a comfortable sleeping environment, they serve different purposes. Sheets cover the mattress and provide a smooth surface, blankets offer warmth, and cushions are generally used for seating rather than specifically for head support. Thus, when considering what is primarily used for resting the head, a pillow is the most appropriate choice.