Answer:
The answer is displacement mechanism.
Step-by-step explanation:
Displacement is a defense mechanism that is based on directing strong emotions to an object or person that is not responsable for our reaction. This allows people to satisfy their need to react without having negative consequences.
Tearing pictures is a relatively healthy way to displace emotions. A more extreme example would be to get angry at someone else, even if they are undeserving of these reactions.