Answer:
I am the yellow hem of the sea's blue skirt.
What can you catch but not throw?
I am black when I am clean and white when I am dirty?
An iron horse with a flaxen tail. The faster the horse runs, the shorter his tail becomes.
In your fire you hear me scream, creaking and whining, yet I am dead before you lay me in your hearth.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?