_______ is a zombie fire ?

a) Fire that has no known source
b) Fire that smoulders underground and reignites when weather warms
c) Fire that is caused by zombies, aliens
d) None of these

The Zombie fire is a fire that is leftover from the previous growing season that can burrow into the rich organic material beneath the surface that is made up of carbon-rich peat and smoulder under the snowpack throughout the frigid winter. When the weather warms, the fire reignites and refuses to die, as per a study by scientists from the Institute of Arctic and Alpine Research at the University of Colorado in the United States.