Final answer:
Cornelius tells Taylor that the forbidden zone is called so because it is a 'place of no return,' a lifeless and dangerous wasteland in the film Planet of the Apes.
Step-by-step explanation:
When Taylor asks Cornelius why it is called the forbidden zone, the answer he's given is "It's a place of no return." This is directly referencing the context from the 1968 film Planet of the Apes, where the forbidden zone is a desolate, lifeless area that is avoided by the apes. It is thought to be a barren wasteland where nothing can survive, and thus, those who venture there are not expected to return. The term forbidden indicates a strong prohibition, suggesting that entry is not just discouraged but also potentially punishable by the societal rules within the narrative of the film.