Both cutting of cloth and dropping of glass are physical changes, but burning tires is actually a chemical change so we can eliminate that one. Now, we have just the first two options to consider.
Dropping of glass is not really a <em>useful</em> physical change - in fact, dropping glass is usually not something anybody wants to do and can lead to injuries. Cutting of cloth, on the other hand, can help people to make clothes or furniture. So, I would say that A is a useful physical change and makes the most sense as an answer.
