Answer:
Hypertext Markup Language (HTML) is the standard markup language for documents designed to be displayed in a web browser
Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language like HTML.
Step-by-step explanation:
HTML stands for Hyper Text Markup Language. It describes the structure of a Web page and consists of a series of elements. HTML elements tell the browser how to display the content and the elements are represented by tags which label pieces of content such as "heading", "paragraph", "table", and so on. Browsers do not display the HTML tags, but use them to render the content of the page
HTML can be assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript.
Example are:
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>
<h1>My First Heading</h1>
<p>My first paragraph.</p>
</body>
</html>
While CSS means Cascading Style Sheets. It describes how HTML elements are to be displayed on screen, paper, or in other media CSS saves a lot of work. It can control the layout of multiple web pages all at once. External stylesheets are stored in CSS files
It's possible to build pages of web sites without CSS but CSS is what gives every website its design. Surely, websites pages may not be beautiful, fun and friendly without it!
Some certain aspects of them would not look neat and nice as expected.