Final answer:
Shane's dream of failing a chemistry test manifests the manifest content, which is the literal storyline of the dream, rather than the symbolic latent content that represents unconscious thoughts or desires.
Step-by-step explanation:
According to Sigmund Freud, the account of Shane's dream in which he failed an important chemistry test represents the manifest content of his dream. The manifest content is essentially the straightforward plot of the dream, what happens on the surface. It is the actual storyline that the dreamer remembers upon waking. On the other hand, the latent content would refer to the hidden, symbolic meaning behind the manifest content of the dream. This might include unconscious desires, fears, or conflicts that are expressed through symbolism within the dream. In Shane's case, his dream of failing could symbolize underlying anxieties about academic performance or fear of failure in general.