Answer:
It is a sound of empty, speak and it'll talk back plenty. But all the more you yack, you'll get the same words back.
What looks back but cannot see?
What hangs others yet can unintentionally hang itself?
In buckles or lace, they help set the pace. The farther you go, the thinner they grow.
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
I am a vegetable that bugs stay away from