?Explain theCascading Style Sheets (CSS) box model. Include descriptions about margin, border, and padding along with examples in the explanation.

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?Each block element such as a header, nav, main, and footer element has a top, right, bottom, and left side. In other words, the element is displayed in a browser as a box with content. The CSS box model describes these boxes of content on a webpage.Each content box can have margins, borders, and padding. The sides of a box is referred to in clockwise order: top, right, bottom, and left. The margin provides passive white space between block elements or between the top or bottom of a webpage. One can define margins at the top, right, bottom, and left of a block element. Margins are transparent and are measured in pixels (px), ems (em), or percentages (%).The border separates the padding and the margin of the block element. A border can vary in thickness and color and can be defined at the top, right, bottom, and left sides of a block element. A border can also have a style such as solid, dashed, or dotted.Paddingis the passive white space between the content and the border of a block element. Padding is typically measured in pixels (px), ems (em), or percentages (%). By default, padding is set to 0px, so paragraph text, for example, appears at the edges of the block element. The padding can be increased to improve legibility. The background color for the padding and content is always the same.Using CSS, one can set the margin, border, or padding properties for all four sides of a block element using a single declaration. For example, the following declaration sets the top, right, bottom, and left margins of a block element to 2em:margin: 2em;One can use a similar shorthand notation to set the style, width, and color for all four sides of a block element's border. The property values can appear in any order. The following declaration sets the top, right, bottom, and left borders of a block element to a solid line using a width of 1 pixel and a color of black:border: solid 1px #000000;Writing the declaration using shorthand notation is helpful when all four sides of the block element use the same property values. If one needs to use different property values on one or more sides of the block element, then a declaration should be included for each side of the block element.To have a border appear around the content in a block element, a border style in a CSS statement must be specified. One can include the style value with the border property or use the border-style property with an assigned value.