Reaction
A reaction is usually any response caused by some other action:
- chain
- chemical
- emotional
- hill
- light
- physical reaction - Defined by Newton's third law: "For every action there is an equal and opposite reaction". The idea that any given force has a pair or opposite force.
- reflexive
- political - The reaction is the attitude of the reactionaries, or their political movement
- risk management - The reaction is a response after the hazard. Prevention is a response before the hazard materialization.


