Final answer:
The statement is True. Headers serve as section titles in a distinct typography style as well as the space at the top of each page for supplementary information. They act as organizational tools in documents and multimodal compositions.
Step-by-step explanation:
The statement that a header refers to two completely separate concepts: a font style used to separate sections of a document and the space above each page in a document, is True. Headers in a document serve multiple purposes. They can indicate the title of a section, often utilizing a distinct typography style, making it stand out and providing structure to the content. Additionally, the header of a document refers to the space at the top of each page, which may include information like the title, chapter name, author's name, or page numbers.
Effective use of headers includes content titles and headlines that accurately describe and distinguish the composition from others. An informative header, such as in a blog post about the Pollution Prevention Act, not only contextualizes the composition but also signals the author's perspective. Similarly, the used typography, whether it's a boldface or italic, can vastly affect the conveyance of meaning and set expectations for the readers. The use of headings and subheads as organizational tools is exemplified by the multimodal compositions like the United Nations poster.
In academic writing, the introduction typically leads with a header that introduces the content and identifies the thesis, while the conclusion is frequently marked with a boldface heading. Visual elements often accompany written sections, supported by evidence such as statistics or expert opinions. These headers guide readers, indicating where a section starts and ends and what type of content to expect.