Final answer:
When wool is flattened, rolled, and turned into felt, it undergoes a process called felting. This process causes the wool fibers to interlock and create a dense and non-woven fabric. The correct answer is d) Stretched into canvas.
Step-by-step explanation:
When wool is flattened, rolled, and turned into felt, it undergoes a process called felting. Felting is the matting together of wool fibers through heat, moisture, and agitation. This process causes the wool fibers to interlock and create a dense and non-woven fabric. Felting can be done by hand or by using a felting machine. In hand felting, the wool is manipulated by rubbing, agitating, and applying heat and moisture to encourage the fibers to mat together. Rolling the wool between two surfaces can also help to flatten and compact the fibers. So, the correct answer to your question is d) Stretched into canvas. Wool is not woven into fabric when it is flattened, rolled, and turned into felt. Instead, it goes through the process of felting and becomes a dense and non-woven fabric.