Answer: The latent content of the dream would be wished they were dead, while the manifest content of the dream would be pushed them off a cliff
Explanation: The latent content of the dream according to Freud, is the hidden, deep meaning of the dream, the psychological meaning. This latent meaning is usually hidden and lies beneath that literal, visual experience in a dream.
The manifest content of the dream is a visual, symbolic part of the dream, which conceals the essential, or latent, meaning of the dream. It is in fact a literal theme, which we dream, or so to speak, a "real" theme which is visible in the dream.
In this case, the hidden, latent content of the dream is that one wished his parents were dead, while the visual depiction pushed them off a cliff, the manifest part of the dream, the symbolic one.