Final answer:
Ravi's behavior of spreading false rumors due to losing a class election can be best explained by the frustration-aggression principle, which suggests that aggression is a result of blocked goals.
Step-by-step explanation:
Ravi's behavior of spreading false rumors after losing an election to sabotage the reputation of the newly elected class president is most accurately explained by the frustration-aggression principle. This principle posits that frustration can lead to aggression when an individual's goal is thwarted. In this case, Ravi's goal of becoming class president was blocked, and in response, he acted aggressively by spreading false rumors about the victor. His behavior reflects a direct link between his frustration at losing the election and his subsequent aggressive actions towards the new president.