Final answer:
The function to remove PDF content from a page to be used later is Extract Content. This allows selective saving of text, images or pages as separate files, distinguishing it from other PDF editing functions.
Step-by-step explanation:
The function that allows you to remove PDF content from a page to be used later is C) Extract Content. This function is typically found in PDF reader and editor applications. It enables you to select specific parts of a PDF, such as text, images, or whole pages, and save them as separate files. This is especially useful when you need only a portion of a document or when you want to reorganize the content. While Cut and Paste is used for moving content within a document, Crop Page is for altering the visible page area, and Redact Text permanently removes sensitive information without the possibility of retrieval.