Tornado destroys, fire burns identifies cause and effect.
One process, the cause, is responsible for the second, the effect, and the second is, in turn, dependent on the first. <em>In each pair, the cause is given first the effect later</em>.
Tornadoes generally leave destruction in their wake: they destroy houses, crops and even take lives. Fire burns or melts everything in its way at the right temperature. Few materials are not affected by it.
