Answer :
The section property that should be set to zero is height.
A website's footer can be described as an area that placed at the bottom of each page on a website, below the primary body content. The term “footer” create from the print world, in which the “footer” is a consistent design component that is seen across all pages of a document. The header of your website means location where you would get your site title or a business logo, also many sites will have their navigation links in the header section. A header means text that is located at the top of a page, whereas a footer is located at the bottom, or foot, of a page. The area has function to insert document information, namely the name of the document, the chapter heading, page numbers, creation date and the like.
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