How does the DOCTYPE declaration affect the box model?
Difficulty level
It adds animations to boxes.
It determines the color of the boxes.
It influences how the browser calculates widths and margins.
It sets the default width of all elements.
The DOCTYPE declaration influences how the browser interprets and renders the content. In the context of the box model, particularly in older browsers like Internet Explorer 6, the absence or type of DOCTYPE can affect whether the browser uses the "quirks mode" or "standards mode" box model. The "quirks mode" box model includes padding and border in the width of an element, whereas the "standards mode" doesn't.