Answer:
What can you catch but never throw?
What can be cracked before it's used?
I tremble at each breath of air and yet can heaviest burdens bear.
I have more shoes than anybody but less feet than everyone. I am met in the morning but departed in the night. I may shake as if I'm angry but I won't bite.
I am gentle enough to soothe your skin light enough to fly in the sky and strong enough to crack rocks.
I start with T end with T and within me is T.