An HTML form is made up of form controls, and is used to collect information from users in a website. Learn how to structure form and interact with your users.
Block-level elements occupy the entire line width, but inline-level elements do not occupy a line width. They rather stay in-line with other elements.
In web design, the Block level elements are HTML tags that begins on a new line, and occupy the entire line width to form block items. They include layout, etc