Question: Use an old CD for scaring birds from your garden.
Option 0: Tie a strong string through the hole in the CD, to make it easy to hang. Hang the CD near the plants that you are protecting, close enough to tthe ground that they touch the ground and will not move
Option 1: Tie a strong string through the hole in the CD, to make it easy to hang. Hang the CD near the plants that you are protecting, leaving enough space for the wind to move the CD.
Answer: 1