Answer:
I am million people's wakeup call. What am I?
A mechanism to discover who is following you.
What never gets any wetter no matter how hard it rains?
A twiggy home
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
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.