Answer:
In your fire you hear me scream creaking and whining yet I am dead before you lay me in your hearth.
I begin your sentences. What am I?
Use me to reward good behavior.
I am owned by the poor the rich does not need me. If you eat me you will die!
There are four of us but it seems like everyone loves spades the most.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.