Answer:
What can be cracked before it's used?
I am bought by the yard but worn by the foot. What am I?
In all the world none can compare I am a tiny weaver my deadly cloth so silky and fair.
I'm blue at day and black at night. I do contain some creatures born and died. What am I?
I am a million peopleโs wakeup call
If itโs information you seek, come and see me. If itโs pairs of letters you need, I have consecutively three. What am I?